Bugatti technology on display at the Geneva Motorshow
The Bugatti stand at the 2010 Geneva motorshow features an exhibit of a Grand Sport broken down into its two main sections: the front end/monocoque, and the rear section with the engine and gearbox.
The two sections are normally joined together by titanium bolts. The most striking thing about the rear section is the unique titanium exhaust system. This is surrounded by the electrohydraulic wing-spoiler array. The double wing, which both provides aerodynamic stability and functions as a brake, is normally hidden from view but here it is clearly visible. At the other end of the rear section, the two engine-turned aluminium oil sumps can be seen. The high-strength CFRP roll bar above these is visible on the passenger side, but hidden by an air scoop on the driver’s side.
The monocoque, incorporating main beams and cross members made of lightweight, high strength carbon, can be recognised by its fibre structure. A saddle fuel tank is built into this in a protected position, with a firewall between it and the engine. The ceramic brake discs and the polished stainless steel suspension, which are normally hidden behind the wheels, are also clearly visible in the technical exhibit.
This unique insight into the workings of the Veyron is sure to be a big attraction at the show. It is complemented by a separate display of the Veyron’s engine and gearbox. Bugatti Automobiles S.A.S. was the first manufacturer in the world to offer a seven-speed twin-clutch gearbox, which is mounted longitudinally in front of the mid-engine in the all-wheel-drive Veyron. Both gearbox and engine use a dry-sump design, primarily because this helps to achieve a lower centre of gravity.
Distribution of engine torque between the two axles is handled by a Haldex clutch located behind the front-axle differential, while the rear-axle differential is notable for its multi-disc differential lock.
At 710 millimetres in length, the car’s 16-cylinder mid-engine is no bigger than a conventional V12 unit. Its compact dimensions are made possible by the unique W layout, which consists of two offset double row banks, each comprising eight cylinders and with a bank angle of 15 degrees. The two banks are at an angle of 90 degrees to each other, and are housed in to a single crankcase.
This means that they function as a single engine, aspirated by four turbochargers. The engine has a maximum output of 1001 horsepower at 6,000 rpm, and develops 1,250 newton-metres of torque between 2,200 and 5,500 rpm.
