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.

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.