Want to continue learning about engineering with videos like this one? Then visit:
courses.savree...
Want to teach/instruct with the 3D models shown in this video? Then visit:
savree.com/en
******************************************************************
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!
Like this video? Then check out our other videos!
🚢 Marine Diesel Two Stroke Engine - How it Works! - • Marine Diesel Two Stro...
🚢 Ship Parts and Terminology Explained! - • Ship Parts and Termino...
⚙️How Deaerators Work! - • How Deaerators Work (E...
⚙️How Shell and Tube Heat Exchangers Work! - • How Shell and Tube Hea...
⚙️How Power Grids Work! - • The Electrical Grid an...
⚙️How Watertube Boilers Work! - • The Electrical Grid an...
⚙️How Dams Work (Hydro Dams)! - • How Dams Work (Hydro D...
💡Control Valve Types (Gate Valve, Globe Valve etc.)! - • How Shell and Tube Hea...
💡Transformer Parts and Functions! - • Transformer Parts and ...
💡Plate Heat Exchangers Explained! - • Video
📚Want to learn more about engineering?
Then join saVRee to access over 45 hours of engineering video courses! New courses every month!
courses.savree...
Hope to see you on a course soon! 👋
🏫Want to use the 3D model in this video to present, instruct, or teach? Simply join saVRee! We have over 400 engineering models that will make your life a lot easier!
savree.com/
📱Check out our socials!
linktr.ee/savree
📖You can learn more about engineering in our technical encyclopedia: savree.com/en/...
▶️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.
#saVRee #Automotive #IndustrialEngineering
30 сен 2024
