The difference between two-stroke and four-stroke engine cycle lies in the movement of the crankshaft and piston. In the article, let us learn more differences between them.
What is a Two-Stroke Engine?
A two-stroke engine is an engine that completes a power cycle with two strokes of the piston during only one crankshaft revolution.
What is a Four-Stroke Engine?
A four-stroke engine is an internal combustion engine in which the piston completes four separate strokes while turning the crankshaft.
|
Two Strokes |
Four Strokes |
| It has one revolution of the crankshaft during one power stroke | It has two revolutions of the crankshaft during one power stroke |
| It generates high torque | It generates less torque |
| Its uses port for fuel’s outlet and inlet | It uses valves for outlet and inlet of a fuel |
| Its engines result in lesser thermal efficiency | Its engines result in higher thermal efficiency |
| It has a larger ratio in terms of power to weight | It has a lesser ratio in terms of power to weight |
| It generates more smoke and shows less efficiency | It generates less smoke and shows more efficiency |
| Requires more lubricating oil as some oil burns with the fuel | Requires less lubricating oil |
| Due to poor lubrication, more wear and tear occurs | Less wear and tear occurs |
| Engines are cheaper and are simple for manufacturing | Engines are expensive due to lubrication and valves and are tough to manufacture |
| Engines are basically lighter and are noisy | Engines are basically heavier because its flywheel is heavy and are less noisy |
These were some two strokes and four stroke differences. If you wish to learn about more related concepts, download BYJU’S The Learning App.
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