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Encyclopedia > W engine

The W engine is an engine configuration in which the cylinder banks resemble the letter W in the same way a V engine resembles the letter V. There have been three entirely different implementations of this concept: one with three banks of cylinders, one with four and one with two banks of cylinders and two crankshafts. Engine configuration is an engineering term that refers to the layout of pistons in an internal combustion engine. ... A V engine is a common configuration for an internal combustion engine in which the pistons are aligned so that, if viewed along the line of the crankshaft, they appear to be in a V. The V configuration reduces the overall engine length and weight compared to an equivalent straight... Crankshaft Continental engine marine crankshafts, 1942 The crankshaft is that part of an engine which translates linear piston motion into rotation. ...

Contents

The Original "three-bank" Design

The classical W engine uses three banks of cylinders, all connected to one crankshaft. Crankshaft Continental engine marine crankshafts, 1942 The crankshaft is that part of an engine which translates linear piston motion into rotation. ...


One of the first W engine was a W3, built by Anzani in 1906 to be used in their motorbikes. It is this W3 engine which also powered the Blériot XI, the aircraft used by Louis Blériot when on the 25th of July, 1909, he made the first ever successful flight across the English Channel. The Anzani was an Italian automobile manufactured from 1923 to 1924 by a company, founded by Alessandro Anzani. ... 1906 was a common year starting on Monday (see link for calendar). ... A motorcycle (or motorbike) is a two-wheeled vehicle powered by an engine. ... An aircraft is any machine capable of atmospheric flight. ... Louis Blériot Louis Blériot (July 1, 1872 - August 2, 1936) was a French inventor and engineer, who performed the first flight over a large body of water in a heavier-than-air craft. ... The English Channel ( French:La Manche) is the part of the Atlantic Ocean that separates the island of Great Britain from northern France, and joins the North Sea to the Atlantic Ocean. ...


The 1917 Napier Lion aircraft had a first W12 engine. 1917 was a common year starting on Monday (see link for calendar). ... The Lion was a 12-cylinder W-block inline aircraft engine built by Napier & Son starting in 1917, and ending in the 1930s. ... A W12 is a 12-cylinder engine in a W configuration. ...


Later, a W12 design was also pursued by Audi, who later abandoned the project. However, the Volkswagen Group later built an experimental W18 engine for Bugatti's EB 118 and EB 218 concept cars, but the design was determined to be impractical because of the irregular firing sequence required by the three rows of six cylinders. Press photograph of the newly merged Audi NSU range, 1969. ... Volkswagen AG (TYO: 7659) is a German corporation. ... The only W18 engine ever built powers the Bugatti EB 118 and Bugatti EB 218 concept cars of 1998 and 1999. ... Bugatti is one of the most celebrated marques of automobile and the one of the most exclusive Italian/French car producers of all time. ... The Bugatti EB 118 show car debuted in 1998. ... The Bugatti EB 218 was a concept sedan. ...


The Modern "four-bank" Design

The Volkswagen Group (VAG) created the first successful automotive W engine with the introduction of their W12. It combined two narrow-angle VR6 engines around a single crankshaft for a total of four banks of cylinders. For this reason, the four-bank configuration is sometimes, and more accurately, referred to as a "VV" ("vee-vee" or "double-vee") to distinguish it from the traditional three-bank "W" design. Volkswagen AG (TYO: 7659) is a German corporation. ... Volkswagen AG ( TYO: 7659) is a German corporation. ... A W12 is a 12-cylinder engine in a W configuration. ... VR6 is an engine configuration developed by the Volkswagen Group. ... Crankshaft Continental engine marine crankshafts, 1942 The crankshaft is that part of an engine which translates linear piston motion into rotation. ...


The W-12 is used in the Volkswagen Phaeton, the Audi A8 and the Bentley Continental GT - though in the latter application, the engine has been highly modified by Bentley and fitted with twin KKK turbochargers. As a result, it produces considerably more power than the original version. The narrow (15°) angle between bank pairs makes this engine resemble a V12 in that it has just two cylinder heads and two sets of camshafts. Phaeton interior The Volkswagen Phaeton (pronounced fay-tun) is a large luxury sedan manufactured by Volkswagen. ... The Audi A8 is Audis luxury car flagship. ... Categories: Automobile stubs | Bentley vehicles ... Turbocharger Cut-away A turbocharger is a compressor used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. ... A V12 is an internal combustion engine with 12 cylinders in V configuration. ... The camshaft is an apparatus used in piston engines to operate poppet valves. ...


VAG went on to produce a W16 prototype which produced 623 horsepower (465 kW) for the Bentley Hunaudières concept car. A quad-turbocharged version of this engine will go into production in 2005 powering the 1001hp Bugatti Veyron 16.4. A W8 engine was also produced for use in the VW Passat. A W16 is a 16-cylinder piston engine in a W configuration. ... The horsepower (hp) is the name of several non-metric units of power. ... A concept car is a car prototype made to showcase a new vehicles styling, technology, and overall design before production. ... Turbocharger Cut-away A turbocharger is a device used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. ... Bugatti EB 16/4 Veyron concept car Bugatti EB 16/4 Veyron concept car interior The Veyron 16. ... A W8 is an 8-cylinder piston engine consisting of four banks of two cylinders, or two juxtaposed V4 engine blocks, coupled to one crankshaft. ... The Volkswagen Passat is a midsized car built by Volkswagen AG. It falls between the VW Golf/Jetta and VW Phaeton in the current VW production line-up. ...


The major advantage of these engines is packaging, i.e., they contain high numbers of cylinders but are relatively compact.


The Motorcycle "two-bank" Design

A very rare type of W engine is found in motorbikes of the MotoGP class. These are 2-stroke, 500 cc V engines with two banks of two cylinders and two separate crankshafts, one per bank of cylinders, thus constituting a sort of "W" form. The angle between the banks varies from 60 to 75 degrees. A motorcycle (or motorbike) is a two-wheeled vehicle powered by an engine. ... Grand Prix motorcycle racing refers to the premier categories of motorcycle road racing. ... The two-stroke cycle of an internal combustion engine differs from the more common four-stroke cycle by having only two strokes (linear movements of the piston) instead of four, although the same four operations (intake, compression, power, exhaust) still occur. ... CC in Roman numerals is 200. ... A V engine is a common configuration for an internal combustion engine in which the pistons are aligned so that, if viewed along the line of the crankshaft, they appear to be in a V. The V configuration reduces the overall engine length and weight compared to an equivalent straight...


There are two major advantages of these engines over the more traditional straight-4 or V4 engines. The first is the width of the engine: a V4 engine will be narrower than a straight-4 engine with the same displacement, but a W4 with its two crankshafts will be even smaller. The second advantage is that the W4 lacks the need for a balance shaft; it will run smoothly if the two crankshafts rotate in opposite directions. This is a weight advantage over the V4 engine, which will need a balance shaft. The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ... This article is about the V4 engine. ... Engine displacement is defined as the total volume of air/fuel mixture an engine can draw in during one complete engine cycle; it is normally stated in cubic inches, cubic centimeters, or litres. ... In piston engine engineering, a balance shaft is an eccentric weighted shaft which offsets the vibrations of unbalanced engines. ...


Examples of these type of W4 engines are the Yamaha YZR500 and the Cagiva GP500 motorbikes. A manufacturer of a diverse range of musical instruments and electronics. ... Cagiva was founded in 1950 in Italy by Giovanni Castiglioni producing small metalic components. ...


These types of engines should not be confused with the U engine, which also has two banks of cylinders and two crankshafts, but which is made by combining two similar straight engines. The U engines lack the advantages the "W"-form of the engine has in terms of width and weight. A U engine is a piston engine made up of two separate straight engine engines (complete with separate crankshafts) joined by gears. ... Crankshaft Continental engine marine crankshafts, 1942 The crankshaft is that part of an engine which translates linear piston motion into rotation. ... Usually found in 4 and 6 cylinder configurations, the straight engine or inline engine is an internal-combustion engine with all cylinders aligned in one row, with no or only minimal offset. ...


Related topics

A W8 is an 8-cylinder piston engine consisting of four banks of two cylinders, or two juxtaposed V4 engine blocks, coupled to one crankshaft. ... A W12 is a 12-cylinder engine in a W configuration. ... A W16 is a 16-cylinder piston engine in a W configuration. ... The only W18 engine ever built powers the Bugatti EB 118 and Bugatti EB 218 concept cars of 1998 and 1999. ...

See also

Usually found in 4 and 6 cylinder configurations, the straight engine or inline engine is an internal-combustion engine with all cylinders aligned in one row, with no or only minimal offset. ... A V engine is a common configuration for an internal combustion engine in which the pistons are aligned so that, if viewed along the line of the crankshaft, they appear to be in a V. The V configuration reduces the overall engine length and weight compared to an equivalent straight... VR6 is an engine configuration developed by the Volkswagen Group. ...

External links

  • Volkswagen's VR6 and W-engines (http://autozine.kyul.net/technical_school/engine/tech_engine_packaging.htm)

  Results from FactBites:
 
W engine - Wikipedia, the free encyclopedia (809 words)
The W engine is an engine configuration in which the cylinder banks resemble the letter W in the same way a V engine resembles the letter V.
One of the first W engine was a W3, built by Anzani in 1906 to be used in their motorbikes.
These are 2-stroke, 500 cc V engines with two banks of two cylinders and two separate crankshafts, one per bank of cylinders, thus constituting a sort of "W" form.
Heat engine - Wikipedia, the free encyclopedia (1553 words)
In engineering and thermodynamics, a heat engine performs the conversion of heat energy to mechanical work by exploiting the temperature gradient between a hot "source" and a cold "sink".
On Earth, the cold side of any heat engine is limited to close to the ambient temperature of the environment, or not much lower than 300 kelvins, so most efforts to improve the thermodynamic efficiencies of various heat engines focus on increasing the temperature of the source, within material limits.
The efficiency of various heat engines proposed or used today ranges from 3 percent [1](97 percent waste heat) for the OTEC ocean power proposal through 25 percent for most automotive engines, to 35 percent for a supercritical coal plant, to about 60 percent for a steam-cooled combined cycle gas turbine.
  More results at FactBites »

 
 

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