A two-stroke cycle engine is a type of internal combustion engine that completes a single crankshaft revolution power cycle with two-piston strokes. This engine provided some advantages and disadvantages comparing with a four-stroke engine. Let us have a deep insight into the pros and cons of the two-stroke engine in this article.
Advantages of two-stroke engine :
- Simpler in design because don't have valve only port.
- Power developed is twice as compared to same dimensions four-stroke engine with the same operating speed.
- The work required to overcome the friction of the exhaust and suction strokes is saved.
- Burnt gases do not remain in the clearance space because of scavenging.
- Two-stroke engines can work in any position since oil flow is not a concern with any valves to worry about.
- It occupies lesser space.
- Lighter in weight because the lighter flywheel is used.
- Easy to maintain.
- Less cost.
- It produces Uniform torque.
- Power to weight ratio is high.
Disadvantages of two-stroke engine :
- A high-speed two-stroke engine is less efficient.
- When the inlet valve of the engine is opened for the intake of the air-fuel mixture, the exhaust valve is also open so the part of the fuel is wasted this increase fuel consumption and reduce overall efficiency.
- Effective compression is less in case of a two-stroke engine.
- These engines are liable to cause heavier combustion of lubricating oil.
- With heavy loads, it gets heated due to excessive heat produced.
- Thermal efficiency is also less.
- It causes pollution and smoky.