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Main advantage of a two-stroke engine over four-stroke engine is
  • a)
    more uniform torque on the crankshaft
  • b)
    more power output for the cylinder of same dimensions
  • c)
    absence of valves
  • d)
    all of the above
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Main advantage of a two-stroke engine over four-stroke engine isa)more...
Advantages of two-stroke engine over four-stroke engine are
1. Low cost
2. More uniform torque and hence lighter flywheel is needed
3. Because of one power stroke for one revolution, power produced for same size of engine is more
4. Light weight and simplicity due to the absence of valve mechanism.
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Main advantage of a two-stroke engine over four-stroke engine isa)more...
Advantages of a Two-Stroke Engine over Four-Stroke Engine

Uniform Torque on Crankshaft
- In a two-stroke engine, the power stroke occurs every revolution of the crankshaft, which provides a more uniform torque output compared to a four-stroke engine where the power stroke occurs every other revolution.

More Power Output for the Cylinder of Same Dimensions
- A two-stroke engine can produce more power output for the same cylinder dimensions compared to a four-stroke engine due to its higher combustion efficiency and faster combustion process.

Absence of Valves
- Two-stroke engines do not have valves, which simplifies the design and reduces the overall weight of the engine. This also eliminates the need for a valve train, which can reduce the maintenance requirements and increase the reliability of the engine.

Overall Advantages
- The combination of these advantages results in a two-stroke engine that is simpler, lighter, and more powerful compared to a four-stroke engine of the same size. This makes two-stroke engines ideal for applications where weight and power output are critical factors, such as in small motorcycles, outboard motors, and chainsaws.
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Main advantage of a two-stroke engine over four-stroke engine isa)more uniform torque on the crankshaftb)more power output for the cylinder of same dimensionsc)absence of valvesd)all of the aboveCorrect answer is option 'D'. Can you explain this answer?
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