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Topic: Wankel engine


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In the News (Mon 19 Aug 19)

  
  Wankel Engine - MSN Encarta
Wankel Engine: The Wankel radial engine is a fascinating beast...
Wankel Engine, internal-combustion engine, powered by gasoline, that uses a triangular-shaped rotor, or rotating part, to produce mechanical energy.
The Wankel engine is powerful for its weight and size, vibrates much less than piston engines, has few moving parts, and can run comparatively quietly and smoothly on different grades of fuel.
encarta.msn.com /encyclopedia_761589790/Wankel_Engine.html   (472 words)

  
  Wankel engine
The Wankel suffered from a lack of interest, and when it later became clear that the jet engine was far too expensive for all roles, the general aviation world had already shrunk so much that there was little money for new engine designs.
Often the Wankel engine is also called a rotary engine, although the term rotary engine formerly referred to a type of aircraft engine which has a static crankshaft and rotating cylinders which looks as if the whole engine is rotating.
Calling the Wankel engine a rotary engine seems to be some kind of historically grown error, because before the Wankel engine was invented and even before Wankel was born, the term rotary engine referred solely to the engine with the static crankshaft and rotating cylinders.
www.nebulasearch.com /encyclopedia/article/Wankel_engine.html   (782 words)

  
 Wankel engine - Engineering
In the Wankel engine, the four strokes of a typical Otto cycle engine are arranged sequentially around an oval, unlike the reciprocating motion of a piston engine.
Since the Wankel output shaft is geared to spin at three times the rotor speed, this becomes one combustion 'stroke' per output shaft revolution per rotor, twice as many as the four-stroke piston engine, and similar to the output of a two stroke cycle engine.
Thus, power output of a Wankel engine is generally higher than that of a four-stroke piston engine of similar engine displacement in a similar state of tune, and higher than that of a four-stroke piston engine of similar physical dimensions and weight.
engineering.wikia.com /wiki/Wankel_engine   (1562 words)

  
 Wankel's rotary engine is turning into a lean, green machine : Cars General
Engineers in Japan and Germany are currently perfecting the engine to run on liquid hydrogen fuel, or as a hybrid in tandem with an electric motor, and they are excited about its prospects.
The Wankel is unique since it generates power using a triangular rotor inside an elongated housing instead of pistons moving up and down in cylinders as in a conventional internal combustion engine.
He stresses that the rotary engine allows for a safer burning of hydrogen fuel with none of the backfiring which is typical of a hydrogen-powered piston motor.
www.earthtimes.org /articles/show/153331.html   (973 words)

  
 Reference.com/Encyclopedia/Wankel engine
In the Wankel engine, the four strokes of a typical Otto cycle engine are arranged sequentially around an oval, unlike the reciprocating motion of a piston engine.
Thus, power output of a Wankel engine is generally higher than that of a four-stroke piston engine of similar engine displacement in a similar state of tune, and higher than that of a four-stroke piston engine of similar physical dimensions and weight.
The design of the Wankel engine requires numerous sliding seals and a housing that is typically built as a sandwich of cast iron and aluminum pieces that expand and contract by different degrees when exposed to heating and cooling cycles in use.
www.reference.com /browse/wiki/Wankel_engine   (3024 words)

  
 Wankel engine - WOI Encyclopedia Italia
Unlike a piston engine, where the cylinder is cooled by the incoming charge after being heated by combustion, Wankel rotor housings are constantly heated on one side and cooled at the other, leading to very high local temperatures and unequal thermal expansion.
The largest Wankel engine was built by Ingersoll-Rand; available in 550 hp (410 kW) one rotor and 1100 hp (820 kW) two rotor versions, displacing 41 liters per rotor with a rotor approximately one meter in diameter, it was available between 1975 and 1985.
This problem was solved by limiting the engine speed to only 1200 rpm and use of natural gas as fuel; this was particularly well chosen, as one of the major uses of the engine was to drive pumps on natural gas pipelines.
www.wheelsofitaly.com /wiki/index.php/Wankel_engine   (2963 words)

  
 Quasiturbine> Theory> Wankel Differences
The Wankel explanation attempt based on centrifugal in-homogeneous mixture (or high gas speed at peripheral) is in contradiction in rotary engines, with the gas rolling mixing effect between the two near surfaces moving one in relation to the other.
In a piston engine, the "cylinder head" is fix and does not move during the piston stroke, so that the residual minimum chamber volume at TDC (this excludes the chamber cut inside the rotor surface) is part of the relaxation volume during the complete stroke, and does not vary.
The center of mass of the Wankel triangular piston is moving in circle with the crank, and this whole triangular mass tends to bang the seals against the housing, requiring the protection of a housing synchronization gear.
quasiturbine.promci.qc.ca /ETheoryQTVersusWankel.htm   (3903 words)

  
 Wankel engine
In rotary engines the emphasis of the rotor (turning piston) rests or it describes a circular course.
The rotary engines can be constructed, in contrast to the lifting piston engines, which are bound to a more or less fixed form, in enormous variety.
The wankel engine was developed in the 70's by many companies, e.g.
library.thinkquest.org /C006011/english/sites/wankel.php3?v=2   (676 words)

  
 MAZDA:History of Rotary | The Rotary Engine
In 1924, at the age of 22, Felix Wankel established a small laboratory for the development of the rotary engine, where he engaged in research and development.
After the war, Wankel established the Technical Institute of Engineering Study (TES) and continued his work on the research and development of the rotary engine and the rotary compressor for commercial use.
In 1957, Wankel and NSU completed a prototype of the type DKM rotary engine, which combined a cocoon-shaped rotor housing with a triangular rotor.
www.mazda.com /mazdaspirit/rotary/story/index.html   (591 words)

  
 Wankel rotary engine Page 2
Wankel was born in 1903 in Lahr in the Schwarzwald in Germany.
In parallel, a new twin rotor engine, based on the M35 unit, was developed and in 1972, the first such engines were delivered from the COMOTOR plant at Altforweiler in the Saar.
Had the engine been made to work efficiently, it is likely that it would have provided the power source for the CX; in the event, the CX was initially fitted with the engines from the DS.
www.citroen.mb.ca /cItROeNet/miscellaneous/wankel/wankel2.html   (878 words)

  
 Wankel rotary engine Page 1
Rotary piston engines do not employ a crankshaft; the linear piston is replaced by a rotary piston coupled to a rotating shaft which performs an uniform or variable rotary movement without being affected by alternating inertial forces due to changes in piston velocity, particularly at top dead centre and bottom dead centre.
Even in the 17th century, engineers were trying to solve the problem of “leak-proofing” between moving parts and this problem continues to be the Achilles heel of the rotary piston engine although Mazda would seem to have reduced this problem to manageable proportions.
Sensaud and Lavaud, (the French engineers responsible for the Traction Avant automatic gearbox which was a failure) applied for a patent for a rotary piston engine with internally meshing gears in a hypocycloid housing and a 5:6 reduction ratio.
www.citroenet.org.uk /miscellaneous/wankel/wankel1.html   (689 words)

  
 Wankel, Wankel Rotary engine, Wankel rotary aircraft engine.
Wankel, Wankel Rotary engine, Wankel rotary aircraft engine.
The piston engine has a crankshaft connected to pistons that move up and down in cylinders, at the top of each stroke the piston is forced by an explosion back down the cylinder.
The Wankel is a four stroke engine, and it is liquid cooled, the aircraft Wankel engines are unique in that they use both a charged oil lubrication system and that charged water cooled system.
www.ultralightnews.com /sunfun99/wankel.html   (978 words)

  
 Why QT is not a Wankel engine
The Wankel engine is based on the principle of volume variation between a curve and a moving cord (a sliding single piston-object on the curve).
In a piston engine, the "cylinder head" is fix and does not move during the piston stroke, so that the residual minimum chamber volume at TDC (this exclude the chamber cut inside the rotor surface) is part of the relaxation volume during the complete stroke, and do not vary.
The center of mass of the Wankel triangular piston is moving in circle with the crank, and this whole triangular mass bangs the seals against the housing, requiring the protection of a housing synchronization gear.
quasiturbine.promci.qc.ca /QTpasWankel.html   (4104 words)

  
 Technical
In the 1950s the German engineer Felix Wankel developed his concept of an internal-combustion engine of a radically new design, in which the piston and cylinder were replaced by a three-cornered rotor turning in a roughly oval chamber.
The Wankel engine's compact size and consequent lesser weight as compared with the piston engine promised to give it increasing value and importance with the rise in petroleum prices during the 1970s and 1980s.
The rotary engine is known for its smoothness because of the fact that the rotors continually spin around in the same direction, unlike pistons which have a frantic stop/start/stop/start activity.
www.mazdarotary.net /technical.htm   (1509 words)

  
 The OS-Graupner Wankel engine
The Wankel was also used in motorcycles, generator units, airplanes, boats, as an auxiliary engine for sailplanes, and even a very large Wankel for use in tanks was developed.
While piston engines use multiple springy steel rings for sealing their round pistons against the round cylinders, and get reasonably good results from this simple and age-old technology, the problem is much harder in the Wankel.
The only way a Wankel could approach a piston engine in efficiency would be by using materials that either are thermally nonconductive (impossible for now), or by operating the entire engine at such a temperature that little heat is extracted from the gases.
ludens.cl /aeromod/wankel/wankel.html   (2499 words)

  
 irishcar.com - Mazda and the Wankel Engine
Wankel was fascinated throughout his entire life with machines, even though he did not possess a technical education.
The rotor itself produces the power of the rotary engine and applies it to the eccentric shaft, which fulfils a function comparable to the crankshaft of a traditional piston engine.
With a twin-rotor engine the lobes of the eccentric shaft are placed 180 degrees in relation to each other, which ensures an almost perfect balance of mass.
irishcar.com /wankelge.htm   (1893 words)

  
 04.10.2001 - Engineers create world’s smallest rotary internal combustion engine
Like the engine in your car, the mini engine produces motion from controlled combustion, which takes place when a fuel such as gasoline is combined with oxygen and a spark in a chamber.
The mini engine is designed to run on liquid hydrocarbon fuels such as butane or propane, chemical cousins of gasoline.
Called a rotary engine or Wankel engine after its inventor, this design has not been as widely used as the piston-style engine found in most cars today, although it did appear in some models of the Mazda RX-7 and is reappearing in the concept cars of tomorrow.
www.berkeley.edu /news/berkeleyan/2001/04/10_cmbus.html   (568 words)

  
 Wankel Rotary Engines
Wankel is a name synonymous with sniggering schoolboys and rotary engines.
Felix Wankel was born on August 13th 1902 in the Black Forest region of Germany.
Wankel conceived the idea of a rotary combustion engine in 1924, eventually gaining a patent in 1929.
www.pistonheads.com /features/rotary   (950 words)

  
 Wankel Engine
In case of engine problems in combustion, the Wankel Engine would only slowly seize to work while in a piston based design engine a possible destruction of inner parts of the engine is likely.
Engine design has so much room for new inventions that this is a brilliant opportunity for those of you with innovative ideas to contribute.
Wankel engines have big advantages but so much money has been already spent in building cylinder engines that it is still not economically justifiable for big corporations to turn to them.
www.prelovac.com /vladimir/wankel-engine   (1196 words)

  
 Craig's Rotary Page: NSU Wankel rotary engines and cars
As NSU had the rotary engine patented, companys wishing to make their own Wankel rotary engines were required to pay a licensce fee.
The engine was mounted under a separate cover of the rear luggage compartment, and the water cooling system was in the front part of the car.
Originally the Ro80 it was to have a two rotor engine with 2 x 300cc capacity (that is, a two rotor version of the single rotor KKM 502 engine used in the spider - this version was called the KKM 512).
cp_www.tripod.com /rotary/pg05.htm   (2581 words)

  
 Animated Engines, Wankel
The Wankel radial engine is a fascinating beast that features a very clever rearrangment of the four elements of the Otto cycle.
In the Wankel a triangular rotor incorporating a central ring gear is driven around a fixed pinion within an oblong chamber.
The fuel/air mixture is drawn in the intake port during this phase of the rotation.
www.keveney.com /Wankel.html   (156 words)

  
 Howstuffworks "Rotary Engine Power"
Rotary engines use the four-stroke combustion cycle, which is the same cycle that four-stroke piston engines use.
This is roughly the equivalent of the pistons in a piston engine.
The neat thing about the rotary engine is that each of the three faces of the rotor is always working on one part of the cycle -- in one complete revolution of the rotor, there will be three combustion strokes.
auto.howstuffworks.com /rotary-engine4.htm   (642 words)

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