2011 11 Bugatti Veyron 16.4 additional information
The heart and soul of the Veyron is the eight-litre W16 engine with four turbochargers, which initially generated 1,001 hp, and an incredible 1,200 hp in later models. The 16-cylinder mid-engine is 710 mm in length, no longer than a conventional V12 engine, and weighs just 490 kg due to its lightweight construction. The engine is fully capable of operating under a continuous full load, a feat that engines designed for use in motor racing, for example, cannot achieve. Its compact dimensions are due to the unique arrangement of its cylinder banks in a W configuration. Two VR8 blocks, each with a 15-degree bank angle, are joined in the crankcase to form one engine. Both eight-cylinder blocks are set at an angle of 90 degrees to each other and are aspirated by a total of four exhaust gas turbochargers.
The Veyron is equipped with a dual-clutch gearbox (DSG), which is the fastest gearbox in the world. Bugatti was the first manufacturer to use a seven-speed variant of the DSG.
Experiencing the Bugatti’s braking system in action is just as much of a thrill as the acceleration. Combined with the simultaneous application of the airbrake, an aerodynamic braking function integrated into the rear wing, the Veyron generates breathtaking deceleration values.
Bugatti chose carbon-ceramic as the preferred material for the brake discs, a Bugatti first, in order to achieve maximum braking performance and to withstand brake disc surface temperatures of up to 1,000 degrees. In addition, titanium was used for the brake disc hub instead of the usual stainless steel. As a result, the Veyron had by far the strongest braking performance in the automotive industry and motorsport at the time.
The most important technical element on the Veyron in this regard is the rear wing. At speeds above 200 km/h it provides additional optimisation of braking performance. The wing flips up to an angle of 55 degrees in less than 0.4 seconds, with important consequences. Firstly, it increases the rear axle downforce, thereby improving the distribution of braking power between the front and rear axles. Secondly, it increases the air resistance, as when an aircraft is landing. At high speeds, the airbrake alone causes deceleration of up to 0.6 G. It is activated via the brake pressure. With standard tyres on appropriate road surfaces, the wheel brakes generate deceleration values of around 1.4 G.
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