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.

K. A. ROSANOV

References in periodicals archive ?
Above the power cylinder piston, the engine operates in a similar method to a Schnurle [27][28] loop scavenged two-cycle engine but with major key differences.
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."
There wasn't a single Detroit Diesel two-cycle engine on display and with the exception of a VM Motori air-cooled in-line six, all of the engines also featured electronic controls.
"The 690 L-70 engine, in the form that it's in right now, is just a plain vanilla two-stroke, simply a traditional homogeneous charged two-cycle engine," Allen continued.
Stephen Foster Briggs developed a six-cylinder, two-cycle engine as an engineering student at South Dakota State College.
[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.
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.

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