The internal combustion engines are revolutionizing the automotive sector. From extra mileage to high-speed engines, they are performing well in our automobiles. The internal combustion engines are two basic categories namely two-stroke engine and a four-stroke engine. The key difference is the power cycle.
The two-stroke engine requires two strokes to complete the power cycle. On the contrary, a four-stroke engine requires four strokes to complete the power cycle.
This is why a two-stroke engine comprises high power to weight ratio. With the small cycle of power generation, it delivers high speeds instantly.
In comparison with a four-stroke engine, a two-stroke engine is lighter and compact one. Due to least moving parts, it is highly efficient and gives better performance while driving.
Moreover, a two-stroke engine requires less maintenance than a four-stroke engine.
Working of two-stroke engines
A two-stroke engine tends to complete its power cycles in two piston strokes. The power cycle of suction, compression, power, and exhaustion takes place in two strokes. But it takes four piston strokes to complete the cycle in the 4-stroke engine.
Two-stroke internal combustion System
The sequence that takes place in the two-stroke internal combustion engine is:
Suction Stroke: The air or the air-fuel mixture is sucked into the engine cylinder.
Compression Stroke: In this stage, the compression of the air-fuel mixture is done inside the combustion cylinder. These two steps are completed in the first cycle of the two-stroke engine.
Power Stroke: The fuel after compression comes for ignition.Tthe spark plug works for ignition and creates an electric spark to produce thermal energy.
Exhaust Stroke: This stroke meant for the removal of the burnt gases from the cylinder. This is done to allow the entry of the fresh charge in the cylinder. These two steps are complete the second cycle of the 2-stroke engine
Two-stroke engine over four-stroke engines
A two-stroke engine only uses two piston strokes of the piston to generate power. Besides, the four-stroke engine uses four piston strokes to complete the cycle.
The design of the two-stroke engine is simple and its complicate in a four-stroke engine.
The two-stroke engine is lighter and requires less maintenance. The four-stroke engine is heavy and requires much maintenance.