Engine with cylinders out of V

The cylinders out of V is a architecture of spark-ignition engines where the cylinders are placed the ones beside the others longitudinally but shifted of a certain angle (15 with 120°) laterally per pair, which makes it possible to place them more close the one of the others, the heads of cylinder intercalating the ones with the others.

The rod S of a pair of cylinders are generally placed on same the Maneton of the crankshaft, seldom on two shifted crank pins.

When they divide the same crank pin, they can be placed side by side or intersected.

Advantages

  • Driving more compact (almost twice shorter than an engine on line having the same number of cylinders)
  • lighter and more rigid shorter Crankshaft thus
  • Less vibrations, perfect cyclic regularity, (but only for one V6 with 60°, or V12 with 72°, the ideal degree of opening being obtained by the operation 360/N, NR being the number of cylinders)
  • particular Sonority

Disadvantages

  • More vibrations, especially for a V with 45°ou with 90°
  • Driving more complex, expensive to manufacture
  • Driving broader

Aperture

The aperture is an important parameter in a V-engine.

In the current automobile production, the engines have an angle between 45° and 90°.

  • V-engine between 45° and 90°: large majority of the cases (the twin-cylinder out of V with 90° is sometimes called twin-cylinder in L, in particular by the firm Ducati);

  • Driving V6 with 60°, V12 with 72°: better possible configuration;
  • V-engine with 110°: developed by Renault F1 TEAM in order to lower the center of gravity;
  • V-engine with 180°: engines " flat " , known as " BOXER" ; to see driving Flat 6 (Porsche);
  • V-engine with 15°: engines VR of the Volkswagen group; the coupling out of V of two engines VR (15°) gives rise to the engine out of W; to see W12 (Audi A6 and A8, Volkswagen Phaeton) and W16 (Bugatti Veyron).

Use

  • Driving of cars with: 4 (rare), 6,8,10 or 12 cylinders;

  • Driving of motor cycles: 2 to 8 cylinders (seldom more than 4);
  • Driving of large or very great power: trucks, machines of civil engineering, boats (to 24 cylinders).

See too

  • Driving PRV - V6

  • Driving V6
  • Driving V8
  • Driving V10
  • Driving V12
  • Driving W16

External bonds

  • V8 Formulates 1 of them

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