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Difference between Four-Stroke and Two-Stroke Cycle Engine

Difference Between Four-Stroke and Two-Stroke Cycle Engine:

In this article we will discuss about the difference between Four-Stroke and Two-Stroke Cycle Engine.The detailed explanation about Four-Stroke and Two-Stroke Cycle Engine is explained as follows.
                        
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Four-Stroke Cycle Engine:

  • The four-stroke engine consists of one power stroke to complete two revolutions of the crankshaft.
  • Initial stage cost is high.
  • Volumetric efficiency is high due to Induction time is more.
  • Small Power is produced for the same size of the engine than the same size of a two-stroke.
  • There is less in tear and wear..
  • Efficiency increases the use of Four-stroke engine.
  • It takes two revolutions of a crankshaft to complete one cycle.
  • The weight of the flywheel used in the four-stroke engine is high than the two-stroke engine due to the turning movement is non-uniform, a Heavier flywheel is used.
  • Due to heavy weight parts are used in the engine the overall weight is more than the two-stroke engine.
  • Friction developed is high.
  • Four-stroke engine is complicated at manufacturing due to more moving parts.
  • It required water cooling system to decrease the engine temperature.
  • The torque produced in the four-stroke engine is less compared to the two-stroke engine.
  • The overall efficiency of the engine is more.
  • The thermal efficiency of the engine is high.
  • Mechanical efficiency is less.
  • Due to the complete burn of fuel, the emissions are low.
  • This type of engine produces less sounds.
  • This type of engine contains valves.

 Two Stroke Cycle Engine:

  • The two-stroke engine consists of one power stroke, which helps to complete the one revolution of the crankshaft and completes the cycle.
  • Initial stage cost is Low.
  • Due to Induction time is less Volumetric Efficiency is low.
  • High power is produced for the same size of the engine.
  • High in tear and wear rate.
  • It required high Lubrication system.
  • It takes one revolution of the crankshaft to complete the two-stroke cycle.
  • The weight of the flywheel used in the Two-Stroke is less compared to a four-stroke engine flywheel, due to the uniform turning movement Lighter flywheel is used..
  • Due to the lighter and smaller parts used in a two-stroke engine, the weight of the engine is less.
  • Friction developed is less.
  • Two-stroke engine is less complicated at manufacturing due to less moving parts.
  • It required only air as cooling system to decrease the engine temperature.
  • The torque produced in the two-stroke engine is higher than the four-stroke engine.
  • The overall efficiency of the engine is low.
  • The thermal efficiency is low.
  • Mechanical efficiency is high.
  • Due to the incomplete burning of fuel, the emissions are high.
  • This type of engine produces more sounds than a four-stroke engine.
  • This type of engine contains ports.
  • It is used where there is less efficiency consider, like small vehicles.


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