The difference between the two-stroke and four-stroke engine cycles lies in the movement of the crankshaft and piston. In the article, let us learn more differences between two-stroke and four-stroke.
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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-Stroke vs Four-Stroke
|
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. |
| It uses a port for the fuel’s outlet and inlet. | It uses valves for the fuel’s outlet and inlet. |
| 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 to manufacture. | Engines are expensive due to lubrication and valves and are tough to manufacture. |
| Engines are basically lighter and noisier. | Engines are basically heavier because their flywheel is heavy and less noisy. |
RELATED ARTICLES:
| Four Stroke Engine | Two Stroke Engine |
Frequently Asked Questions – FAQs
Which stroke engine is lighter in weight?
Less wear and tear occurs in which type of engine?
In a four-stroke engine, less wear and tear takes place.
Which engine has two revolutions of the crankshaft during one power stroke?
Which engine is more noisy?
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