Four-stroke Internal-combustion 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 majority of modern engines are four-stroke internal-combustion engines, with a few variations on this design being used in specific applications.
- Most cars on the road use a four-stroke internal-combustion engine for propulsion.
- The process begins with the intake of air and fuel in the four-stroke internal-combustion engine's cylinders during the intake stroke.
- This noise reduction makes it more difficult to identify cars with four-stroke internal-combustion engines outdoors.
- Small engines, typically used in walk-behind lawn mowers and portable machines, often use a simpler version of the four-stroke internal-combustion engine.