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The Otto Cycle: Two-Stroke vs. Four-Stroke Engines

Explore the advantages and disadvantages of two-stroke and four-stroke engines in the Otto cycle, comparing their performance, efficiency, and environmental impact. Discover how these engine types impact power, weight, emissions, and manufacturing costs.

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The Otto Cycle: Two-Stroke vs. Four-Stroke Engines

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  1. OTTO CYCLE

  2. 4-STAGES OF ENGINE

  3. SUCTION STROKE

  4. COMPERSSION STROKE

  5. POWER STROKE

  6. EXHAST STROKE

  7. EXACT WORKING

  8. 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.

  9. 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.

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

  11. 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.

  12. APPLICATION

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

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