The document details the internal combustion engine, specifically comparing two-stroke and four-stroke designs. Two-stroke engines are less expensive and produce more power but have drawbacks in durability and emissions, while four-stroke engines are more efficient and environmentally friendly but more complex and less powerful. Applications for these engines include vehicles, locomotives, aircraft, and industrial use, with future developments aimed at improving power, efficiency, and reducing emissions.

1. INTRODUCTION
OF
INTERNAL
COMBUSTION ENGINE

2. OTTO CYCLE

3. 4-STAGES OF ENGINE

4. SUCTION STROKE

5. COMPERSSION STROKE

6. POWER STROKE

7. EXHAST STROKE

8. EXACT WORKING

9. TWO STROKE ADVANTAGES
•Is less expensive because of its simpler design.
•The engine fires - spark plug ignites - once every
revolution of the crankshaft.
•They produce twice the power than four stroke
engines.
•Packs a higher weight-to-power ratio because it is
much lighter.

10. TWO STROKE
DISADVANTAGES
•They last less. Lubrication is not as efficient as in a
four-stroke engine with heavy oil.
•Do not use gas efficiently.
•Pollute more.
•Faster wear and shorter engine life than a four stroke
due to the lack of a dedicated lubricating system.

11. FOUR STROKE
ADVANTAGES
•Last longer than two stroke engines
•More efficient use of gas
•Pollute less than two stroke engines

12. FOUR STROKE
DISADVANTAGES
•More complicated. Many more parts to worry
about.
•Half as powerful as two stroke engines (for
equivalent engines)
•Fires once every two revolutions.

13. APPLICATION
•ROAD VEHICALS
•RAILWAY LOCOMOTIVES
•SMALL AIRCRAFTS
•MARINE
•HOUSE USE LAWN MOVER
•INDUSTRIAL, STATIONARY

14. CONCLUSION
 Further increase of power and torque
· Further size and weight reductions
· Further improved fuel economy
· Further reduced emissions
Further reduced manufacturing cost