Comparison between two stroke and four stroke engine
Comparison between two stroke and four stroke engine
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Four stroke engine
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Two stroke engine
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One power stroke for every two revolutions of the crankshaft.
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One power stroke for each revolution of the crankshaft.
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There are inlet and exhaust valves in the engine.
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There are inlet and exhaust ports instead of valves.
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Crankcase is not fully closed and air tight.
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Crankcase is fully closed and air tight.
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Top of the piston compresses the charge.
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Both sides of the piston compress the charge.
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Size of the flywheel is comparatively larger.
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Size of the flywheel is comparatively smaller.
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Fuel is fully burnt.
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Fuel is partially burnt.
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Weight of engine per hp is high.
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Weight of engine per hp is comparatively low.
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Thermal efficiency is high.
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Thermal efficiency is comparatively low.
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Removal of exhaust gases easy.
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Removal of exhaust gases comparatively difficult.
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Torque produced is even.
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Torque produced is less even.
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All types of speed are possible (high and low).
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Mostly high speed engines are there.
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It can be operated in one direction only.
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It can be operated in both directions (clockwise and counter clockwise).
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Last modified: Wednesday, 7 March 2012, 1:58 PM