four-stroke cycle

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four-stroke cycle

[¦fȯr ¦strōk ′sī·kəl]
(mechanical engineering)
An internal combustion engine cycle completed in four piston strokes; includes a suction stroke, compression stroke, expansion stroke, and exhaust stroke.

four-stroke cycle

four-stroke cycle
Induction stroke.
four-stroke cycle
Compression stroke.
four-stroke cycle
Power stroke.
four-stroke cycle
Exhaust stroke.
The sequence of operations by which a reciprocating engine converts heat energy into mechanical energy. During the induction strokes, the fuel-air mixture is inducted into the engine. During the compression stroke, the mixture is compressed. The power stroke follows, during which the mixture is ignited and the resultant rapid increase in pressure drives the piston downward. The exhaust stroke is last, during which the products of combustion are ejected.
References in classic literature ?
He crept down the bank, watching with all his eyes, slipped into the water, swam three or four strokes and climbed into the skiff that did "yawl" duty at the boat's stern.
Raoul sprang from his horse, to which he left the charge of its own preservation, and in three or four strokes was at the gentleman's side; he seized the horse at once by the curb and raised its head above water; the animal began to breathe again and, as if he comprehended that they had come to his aid, redoubled his efforts.
The sailors did not wait for a second invitation; four strokes of the oar brought them to land; Gaetano sprang to shore, exchanged a few words with the sentinel, then his comrades disembarked, and lastly came Franz.
The vehicle is equipped with a 99.7cc four stroke engine that produces 4bhp and has a top speed of 60kmph.
BRP The new G2 is 15 percent more fuel efficient when compared to a four stroke of the same horsepower.
Rawalpindi, February 21, 2012 (Frontier Star): Secretary Punjab has issued orders to replace the two-stroke Rickshaws with four-stroke rickshaws or to convert the two-stroke rickshaws into four stroke rickshaws.
KARACHI, December 19, 2010 (Balochistan Times): There is an urgent need for conversion of two stroke rickshaw into four stroke engines so as to protect Karachi and its inhabitants against tons of toxic pollution with devastating impact on public health, natural vegetation and even on concrete structures of economy in the city.
DJ TRAHAN clawed back a four stroke deficit to win the Bob Hope Chrysler Classic by three shots.
Jarvis led the 180-strong field home on his MRS Sherco four stroke with eight marks dropped.
XP500 TMAX has a four stroke CVT engine (500cc), fuel injection, double disk brakes for the front wheels, radial tires that minimize tread wear, and light weight wheels.
HONDA is to release a four stroke version of its CRF150 motorcycle.