- Single cylinder engine
Four-stroke cycle(or Otto cycle)] A single cylinder engine, colloquially known as a "one-lunger" (or "thumper" in case of it being a large four-cycle), is an engine configurationconsisting of just one cylinder, the simplest arrangement possible for an Otto or Diesel engine. The mounting can be standing, lying or angled.
Pros and Cons
Compared to multi-cylinder engines, single cylinder engines have several advantages, primarily they are simple and economical in construction. Balance shafts and counterweights on the crankshaft must be used to balance the weight of reciprocating parts, and can be expensive and complicated due to the collective mass of multiple cylinders. However, components such as the crank have to be just as strong as in a four-cylinder engine of the same capacity "per cylinder", meaning that some parts are effectively four times heavier than they need to be for the total displacement of the engine. This leads to the biggest downside of the single cylinder engine: it develops considerably lower power to weight ratios than a multi-cylinder of the same type.
Some early automobiles, such as the
Cadillac1906 Model K and 1907 Models L and M used single-cylinder engines [ [http://www.car-nection.com/yann/Dbas_txt/Pho_07.htm Car-Nection.Com] ] . Single cylinder engines were also popular at one time for marine uses (see external links, below). The first Moto Guzzidesign used a horizontal single.
In the USA, the most common configuration is the 50cc-two-stroke seen in many bikes and scooters. These vehicles allowed the first mass-motorisation in many countries. Single cylinders are very common in India and China for engines considered small in the USA but a 180cc is considered large elsewhere in the word. In India, the
Royal Enfield350cc and 500cc has been popular for over 50 years for their large size and low reving torque. Most engines used in small portable appliances, such as chainsaws, generators and lawn mowers, usually have one cylinder. Also, the one-lunger is used in working vehicles, motorsports, airplanes, and as an industrial motor.
Suzuki has produced the
Suzuki LS650 Savage, a 652cc single cylinder 4-stroke motorcycle, off and on from 1986 to the present, although the content has changed slightly and the motorcycle has been renamed the Suzuki Boulevard S40[ [http://www.suzukicycles.org/Savage/LS650-Savage.shtml Suzuki LS650 Savage model history 1986— ] ] .
Rotaxsourced 650cc single cylinder engine was used in the long-lived and highly popular BMW F650GSmotorbike. This bike was designed for distance and adventure touring, a usage to which the simplicity of the single cylinder design is well suited. The single cylinder 4 stroke design also typically develops a wide power band, allowing for a more relaxed selection of gears when riding - ideal when touring.
The world’s largest single cylinder engine
Guinness Book Of World Recordshas announced that the world’s largest single cylinder engine for a motorcycle is the 2000 cc engine that was mounted into an old NSU Konsul motorcycle frame, and was built by Franz Langer, a retired engineer living in Germany. [http://www.cyrilhuzeblog.com/2008/06/02/biggest-single-cylinder-engine-2000-cc/ Biggest Single Cylinder Engine. 2000 CC] ]
* [http://www.prestonservices.co.uk/marine.htm Images of several single-cylinder marine engines]
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Look at other dictionaries:
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