NOUN
- 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
How To Use four-stroke engine In A Sentence
- This was replaced in 1956 by a bigger four-stroke engine offering 297 cubic centimetres of raw power.
- Unlike four-stroke engines, there's a power stroke with every rotation of the crankcase.
- Because a four-stroke engine burns straight unleaded, as opposed to the typical two-stroke's oil-and-gas mix, it's not only less polluting, but sounds more like a Lexus than a chainsaw.
- Unlike two-stroke engines that have simple openings or ports for intake and exhaust, four-stroke engines have intake and exhaust valves at each cylinder head.
- The noise was not appreciably less - perhaps 20 percent - when encountering groups of the newer, four-stroke engine sleds.
- Most smaller gas powered four-stroke engines tend to run a 30 weight oil.
- The combustion chamber of a four-stroke engine is designed to induce turbulence through the addition of ‘squish’ areas in which the top of the piston is the mirror image of a corresponding area of the cylinder head.
- In four-stroke engines, one of the strokes is called the compression stroke.
- Four-stroke engines are heavier than two-strokes but the technology means they burn fuel more completely and emit fewer pollutants.
- Many hunters and boat-users have already moved to four-stroke engines because of the fuel efficiency and cleaner burn, Irving noted.
