Four-stroke Engine (Noun)
Meaning
An internal-combustion engine in which an explosive mixture is drawn into the cylinder on the first stroke and is compressed and ignited on the second stroke; work is done on the third stroke and the products of combustion are exhausted on the fourth stroke.
Classification
Nouns denoting man-made objects.
Examples
- The lawnmower's four-stroke engine was designed to be more efficient and quieter than traditional two-stroke engines.
- Most modern cars use a four-stroke engine, which provides a better balance between power and fuel efficiency.
- The four-stroke engine in the motorcycle was a major upgrade from the previous model, providing more torque and a smoother ride.
- The four-stroke engine is widely used in marine applications due to its reliability and lower emissions.
- The four-stroke engine's higher compression ratio allows for a more complete combustion of the fuel, resulting in increased efficiency and power.