Technology :

With its 16-cylinder four-wheel drive, the Bugatti Veyron 16.4 may well be the most sophisticated production vehicle of all times.

Most of the components tucked beneath its hood are ingenious innovations that were formerly only deemed possible by visionaries like Ferdinand Piech.

Boasting a maximum speed of more than 400 km per hour, the Veyron is unmatched in the super sports category. It offers a total of 1,001 HP, and its ample power reserves even at high speeds are the fabric of dreams for luxury-class limousines: for a constant speed of 250 km/h, the Veyron only needs 270-280 HP. This means that the seven-gear clutch transmission works with a torque of up to 1,250 Newton meters. The Electronic Stability Program (ESP) ensures the necessary flexibility and maneuverability at any speed. The Veyron reaches velocities that would literally lift the car off the ground – if it were not for its ingenious aerodynamics, which keeps it firmly on the road even at full speed. Adjusting the back spoiler, reducing ground clearance, opening and closing the lids – it all adds to the perfect balance between propulsion and down force. Such a super sports car may not seem to be brought to a halt easily, but the Veyron’s ceramic brakes slow it down quicker than it can accelerate. While it takes this exceptional car only 2.5 seconds to go from 0 to 100 km/h, it needs even less time – a mere 2.3 seconds – to come to a standstill from 100 (reference point). To reduce the risk of injuries in accidents, Bugatti had a Formula 1 safety concept adapted for the Veyron. All these technical details combine to make the Veyron a truly exceptional super sports car.

Speed:

The Veyron 16.4 is the fastest production vehicle of all times.

The car documents state a maximum velocity of 407 km/h, but that is an understatement. For years, the Bugatti engineers had worked thoroughly in order to push the 400 km/h boundary. No wind tunnel can simulate this velocity, which is why after each of a long series of improvements, the different ground clearance levels and the modifications of the rear fenders, spoiler and underbody were tested separately on high-speed test ranges. This ambition and diligence paid off, as the official speed measurement proves.

The Veyron’s high velocity is due to the perfect combination of engine technology, consistent lightweight construction, specially developed tyres, and the complex balance of propulsion and down force. For not only the aerodynamic drag is a crucial factor at very high speeds, but also the precise adjustment of the down force that holds the car to the road surface. And in addition to all this, the Veyron production vehicle meets the highest safety, reliability and maneuverability standards of even the most discerning drivers.

To make the optimum aerodynamics, the Bugatti engineers developed three configuration modes. In standard mode, used for speeds up to 220 km/h, the rear spoiler system is completely retracted. In handling mode, used at higher velocities, the vehicles nose is pulled down and the monumental rear spoiler deployed. This produces an additional 350 kg of down force without compromising the Veyron’s exceptional turn dynamics. And then there is the top speed mode for velocities beyond 375 km/h, which is activated before the engine is started. At top speed mode the front diffuser flaps are shut to make the underbody absolutely level, and the spoiler is completely aligned with the chassis, forming a tearing edge – thus, the Veyron is perfectly adapted for top velocities. The down force is reduced to minimize the strain on the tyres, which is already considerable. The car is held down on the road by its own weight and the down force. The Veyron starts immediately at top speed mode, allowing only for a limited turn of the steering wheel. As soon as the driver brakes, the Veyron automatically switches to handling mode. But those who dare to accelerate consistently on a long, straight road will experience the power of the fastest production vehicle of all times.

Driving:

Bugatti’s Veyron 16.4 is the first super sports car with guaranteed ESP functionality at all speeds including top velocity, tested and approved by exceptional racecar drivers.

The first ESP tests at velocities beyond 300 km/h were performed on the dried salt lakes in the American Southwest. The low-friction ground surface is ideal for taking a car’s road grip to the limit. Featuring intelligent four-wheel drive and four electronic controls, the sports car is as safe as it is quick. Two steerage systems, a Haldex clutch, and the rear axle locking diff provide the necessary dynamics, while the brake pressure regulation and active torque control ensure controllability.

In addition to the ingenious electronic controls, the Veyron 16.4 features high-precision engineering and a perfect underbody based on state-of-the-art racing technology. Double traverse control arms in the front and rear guarantee precise wheel control. All elements work smoothly together with minimal friction and a maximum of stability. Suspension, cushioning, and stabilizers react directly and immediately. The steering system is equally well balanced: the high connection stiffness of all elements ensures direct reactivity. The car follows each and every go of the driver, at any speed and with exactly the right dose of servo support. The latter is gradually decreased towards top velocity, making for simple maneuverability in city traffic, smooth directional stability at high speeds, and precise, flawless corner turns on country roads.

The tyres are the last, but certainly not the least factor determining driving dynamics and security. The Veyron 16.4 tires feature a specially developed rubber compound, customized tire tread, and an elaborate tire pressure control system.

Structure:

A super sports car like the Veyron 16.4 needs to be light in order to reach top speeds.

From the initial concept to the design and the selection of materials, the Bugatti engineers tapped the full potential of their considerable expertise to ensure that this car is, indeed, a lightweight. Titanium, Carbon, Magnesium, and Aluminum – each part of the Veyron 16.4 is made of the material with the lowest weight and the highest level of functionality. The titanium piston rods save approx. 4 kg of weight, the titanium screws 3.5 kg, and the magnesium valve caps another 2 kg. By reducing the wheelbase, the original weight was reduced by about a third, and the titanium exhaust system – another Veyron 16.4 first – with its wafer-thin layer of titanium aluminite saves yet another 17 kg. These combined efforts capped the Veyron 16.4’s weight at a compact 1,888 kg. Add the car’s high-powered performance and unmatched speed, and you have a uniquely quick and nimble super sports car.

Optimum protection is guaranteed by the car’s carbon monocoque construction: weighing only 110 kg, the survival cell withstands enormous crash impact forces. This principle is comparable to that used in the Formula 1 world, where drivers usually emerge uninjured from their cars even after severe accidents. The maximum impact force reduction is mainly due to the frames integrated in the carbon monocoque. The front part of the monocoque is made of aluminum; the rear consists of a combination of Carbon, Stainless Steel, and Aluminum. The car’s safety concept, which includes two frontal airbags for the front-seat occupants, is so sophisticated that additional airbags would be redundant. Crash tests have shown the Veyron 16.4 to conform to all international safety standards – and to exceed them. As painful as it was for the engineers to watch their valuable prototypes hit the test wall, they were always glad to see that the Veyron survived these maneuvers nearly unharmed.

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An airstrip drag race between a Bugatti Veyron and Dutch racing driver Ho-Pin Tung in a new E92 M3. View the original on: www.autojunk.nl bugatti veyron

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