Two-Cycle Engine

two-cycle engine

[′tü ¦sī·kəl ′en·jən]
(mechanical engineering)
A reciprocating internal combustion engine that requires two piston strokes or one revolution to complete a cycle.

Two-Cycle Engine


an internal combustion engine in which the work cycle is completed during one revolution of the crankshaft. The cycle includes intake of the fuel mixture (or air), compression, and combustion, as well as expansion and exhaust of gases; the whole cycle is completed during two strokes of the piston.

A part of the fresh charge entering the cylinder is invariably lost through the exhaust openings during the scavenging part of the cycle. This loss lowers the economic efficiency of the two-cycle engine. This type of engine also has the disadvantage of a high thermal loading of the piston, tending to lower the reliability of the engine. A complicated exhaust-scavenging arrangement is an additional disadvantage.


References in periodicals archive ?
We decided to go back to the drawing board to create a product that would work and survive the harsh environment of a two-cycle engine.
T]he power of the two-cycle engine is greater than that of a four-cycle engine of the same dimensions in the ratio of 140 to 80, an excess of 75 per cent.
Spectrum is an independent blender, packager and marketer of specialty lubricants including two-cycle engine oil, small engine oil and hydraulic oil.
09 issue, we suggested spraying a one-second shot of starting fluid into the carburetor of your two-cycle engine if the engine won't fire up on its own.
Ethanol is a big issue in the chainsaw and two-cycle engine community.
Michael Kaergaard Madsen and Jesper Lykke Rasmussen of Vejle, Denmark, won for developing a prototype of a two-cycle engine that pushes unused gas back into the cylinder so that it is burned instead of wasted.
The Express has a two-cycle engine that will propel a rider to 30 MPH, which classifies it as a moped in all 50 states.
And even a mint-condition Trabant, the once-despised East German car with a two-cycle engine that now has a certain nostalgic chic, putt-putting its way along St.
They are currently using soy-based products such as soy-based carpet hacking, two-cycle engine oil, mastic removers, hand cleaners, general-purpose cleaners and soy ink.
These include commercial rail, flange and switch lubricants, wire rope lubricants and top-of-rail lubricants, as well as two-cycle engine oils, for use in both water-and air-cooled engines.
Gas-powered shears are powered by a two-cycle engine, which means that the oil to lubricate the engine is mixed with the gas, so it weighs less than a motor with an oil-filled crankcase.

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