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Wikipedia

Single-cylinder engine

January 01, 1970

A single-cylinder engine, sometimes called a thumper, is a piston engine with one cylinder. This engine is often used for motorcycles, motor scooters, go-karts, all-terrain vehicles, radio-controlled vehicles, power tools and garden machinery (such as chainsaws, lawn mowers, cultivators, and string trimmers). Single-cylinder engines are made both as 4-strokes and 2-strokes.

DKW RT 250 (1952–1953) motorcycle engine

Characteristics edit

 
Villiers engine in a 1959 Bond Minicar

Compared with multi-cylinder engines, single-cylinder engines are usually simpler and compact.[1] Due to the greater potential for airflow around all sides of the cylinder, air cooling is often more effective for single cylinder engines than multi-cylinder engines. This reduces the weight and complexity of air-cooled single-cylinder engines, compared with liquid-cooled engines.

Drawbacks of single-cylinder engines include a more pulsating power delivery through each cycle and higher levels of vibration.[2] The uneven power delivery means that often a single-cylinder engine requires a heavier flywheel than a comparable multi-cylinder engine, resulting in relatively slower changes in engine speed. To reduce the vibration level, they often make greater use of balance shafts than multi-cylinder engines,[3] as well as more extreme methods such as a dummy connecting rod (for example the Ducati Supermono).[4][5] These balancing devices can reduce the benefits of single-cylinder engines regarding lower weight and complexity.

Most single-cylinder engines used in motor vehicles are fueled by petrol (and use a four-stroke cycle),[6][7][8] however diesel single-cylinder engines are also used in stationary applications (such as the Lombardini 3LD and 15LD).

A variation known as the split-single makes use of two pistons which share a single combustion chamber.

Uses edit

 
Yamaha SRX600 (1985–1997) motorcycle engine

Early motorcycles, automobiles and other applications such as marine engines all tended to be single-cylinder. The configuration is almost exclusively used in portable tools, along with garden machinery such as lawn mowers.[9] Single cylinder engines also remain in widespread use in motorcycles, motor scooters, go-karts, auto rickshaws, and radio-controlled models. From 1921 to 1960, the Lanz Bulldog tractor used a large horizontally-mounted single cylinder two-stroke engine.[10] However they are rarely used in modern automobiles and tractors, due to developments in engine technology.

Single cylinder engines remain the most common engine layout in motor scooters and low-powered motorcycles. The Honda Super Cub (the motor vehicle with the highest overall sales since its introduction in 1958) uses a 49 cc (3.0 cu in) four-stroke single-cylinder engine. There are also several single-cylinder sportbikes (such as the KTM 690 Duke R), dual-sport motorcycles (such as the BMW G650GS) and the classic-styled Royal Enfield 500 Bullet.[11][12]

The Moto3 class in the MotoGP World Championship have used four-stroke 250 cc (15.3 cu in) single cylinder engines since the class replaced 125 cc (7.6 cu in) two-strokes in 2012.

Other single-cylinder engines edit

Engines of other sorts, like the beam engine and certain types of Stirling engine, operate using one cylinder and thus can also be considered single-cylinder engines.

References edit

  1. ^ . TheBikeMarket. Archived from the original on 2019-12-17.
  2. ^ "How to Balancing a Single Cylinder Engine Crankshaft and Piston/Connecting Rod Assembly and Flywheel to Reduce Dangerous Vibration". www.gardentractorpullingtips.com. Retrieved 10 July 2019.
  3. ^ "Engine Science: The Balancing Act of Single Cylinder Engines". www.isavetractors.com. Retrieved 10 July 2019.
  4. ^ Methods of Balancing Single Cylinder Engines. Joseph R. Harkness. SAE Transactions. Vol. 77, Section 3: Papers 680436–680591 (1968), pp. 2329-2338
  5. ^ Suzuki's Supermono Engine Design. A second con-rod without a piston. Ben Purvis. April 26, 2019
  6. ^ "5 of the funkiest single-cylinder street bikes". www.motorcyclenews.com. 5 March 2009. Retrieved 7 July 2019.
  7. ^ "The Single Life: 6 of the best thumpers". www.bennetts.co.uk. Retrieved 7 July 2019.
  8. ^ "The 16 Best Retro Motorcycles Make Bikes Great, Again". www.thecoolist.com. 9 August 2016. Retrieved 7 July 2019.
  9. ^ "How Car Engines Work". www.howstuffworks.com. 5 April 2000. Retrieved 10 July 2019.
  10. ^ "The Lanz Bulldog". www.gasenginemagazine.com. December 1988. Retrieved 10 July 2019.
  11. ^ . Archived from the original on 2012-06-12. Retrieved 2012-06-01.
  12. ^ David Blasco. "Royal Enfield Motorcycles". Royalenfields.com. from the original on 2011-12-07. Retrieved 2011-12-06.

January 01, 1970
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A single cylinder engine sometimes called a thumper is a piston engine with one cylinder This engine is often used for motorcycles motor scooters go karts all terrain vehicles radio controlled vehicles power tools and garden machinery such as chainsaws lawn mowers cultivators and string trimmers Single cylinder engines are made both as 4 strokes and 2 strokes DKW RT 250 1952 1953 motorcycle engine Contents 1 Characteristics 2 Uses 3 Other single cylinder engines 4 ReferencesCharacteristics edit nbsp Villiers engine in a 1959 Bond Minicar Compared with multi cylinder engines single cylinder engines are usually simpler and compact 1 Due to the greater potential for airflow around all sides of the cylinder air cooling is often more effective for single cylinder engines than multi cylinder engines This reduces the weight and complexity of air cooled single cylinder engines compared with liquid cooled engines Drawbacks of single cylinder engines include a more pulsating power delivery through each cycle and higher levels of vibration 2 The uneven power delivery means that often a single cylinder engine requires a heavier flywheel than a comparable multi cylinder engine resulting in relatively slower changes in engine speed To reduce the vibration level they often make greater use of balance shafts than multi cylinder engines 3 as well as more extreme methods such as a dummy connecting rod for example the Ducati Supermono 4 5 These balancing devices can reduce the benefits of single cylinder engines regarding lower weight and complexity Most single cylinder engines used in motor vehicles are fueled by petrol and use a four stroke cycle 6 7 8 however diesel single cylinder engines are also used in stationary applications such as the Lombardini 3LD and 15LD A variation known as the split single makes use of two pistons which share a single combustion chamber Uses edit nbsp Yamaha SRX600 1985 1997 motorcycle engine Early motorcycles automobiles and other applications such as marine engines all tended to be single cylinder The configuration is almost exclusively used in portable tools along with garden machinery such as lawn mowers 9 Single cylinder engines also remain in widespread use in motorcycles motor scooters go karts auto rickshaws and radio controlled models From 1921 to 1960 the Lanz Bulldog tractor used a large horizontally mounted single cylinder two stroke engine 10 However they are rarely used in modern automobiles and tractors due to developments in engine technology Single cylinder engines remain the most common engine layout in motor scooters and low powered motorcycles The Honda Super Cub the motor vehicle with the highest overall sales since its introduction in 1958 uses a 49 cc 3 0 cu in four stroke single cylinder engine There are also several single cylinder sportbikes such as the KTM 690 Duke R dual sport motorcycles such as the BMW G650GS and the classic styled Royal Enfield 500 Bullet 11 12 The Moto3 class in the MotoGP World Championship have used four stroke 250 cc 15 3 cu in single cylinder engines since the class replaced 125 cc 7 6 cu in two strokes in 2012 Other single cylinder engines editEngines of other sorts like the beam engine and certain types of Stirling engine operate using one cylinder and thus can also be considered single cylinder engines References edit Single Cylinder Engines TheBikeMarket Archived from the original on 2019 12 17 How to Balancing a Single Cylinder Engine Crankshaft and Piston Connecting Rod Assembly and Flywheel to Reduce Dangerous Vibration www gardentractorpullingtips com Retrieved 10 July 2019 Engine Science The Balancing Act of Single Cylinder Engines www isavetractors com Retrieved 10 July 2019 Methods of Balancing Single Cylinder Engines Joseph R Harkness SAE Transactions Vol 77 Section 3 Papers 680436 680591 1968 pp 2329 2338 Suzuki s Supermono Engine Design A second con rod without a piston Ben Purvis April 26 2019 5 of the funkiest single cylinder street bikes www motorcyclenews com 5 March 2009 Retrieved 7 July 2019 The Single Life 6 of the best thumpers www bennetts co uk Retrieved 7 July 2019 The 16 Best Retro Motorcycles Make Bikes Great Again www thecoolist com 9 August 2016 Retrieved 7 July 2019 How Car Engines Work www howstuffworks com 5 April 2000 Retrieved 10 July 2019 The Lanz Bulldog www gasenginemagazine com December 1988 Retrieved 10 July 2019 690 Duke The essence of motorcycling Archived from the original on 2012 06 12 Retrieved 2012 06 01 David Blasco Royal Enfield Motorcycles Royalenfields com Archived from the original on 2011 12 07 Retrieved 2011 12 06 Retrieved from https en wikipedia org w index php title Single cylinder engine amp oldid 1223254369, wikipedia, wiki, book, books, library,

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