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Photo courtesy Bugatti Automobiles S. The Bugatti Veyron's tail wing creates downforce at high speeds. Engine and air snorkels. Ads can be annoying. But ads are also how we keep the garage doors open and the lights on here at Autoblog - and keep our stories free for you and for everyone.
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Sign Up More Info. We notice you're using an ad blocker. Please consider allowing Autoblog. Allow Us! Here's how to disable adblocking on our site. Click on the icon for your Adblocker in your browser. A drop down menu will appear. The carbon canister for venting the tank is located behind the right-hand rear wheel. It filters toxic gases that can result from outgassing of the fuel and, together with inlet air obtained from the outside, channels them to the engine to be burned.
At the time, the brakes on the Veyron were by far the most powerful brake system in the automotive industry. The ceramic discs, with a diameter of mm and 38 mm thickness at the front axle, and a diameter of mm and 36 mm thickness at the rear, were pioneering technology at the time in terms of material, size and structure for further developments in the super sports car area.
The materials and design of the brake disc are of particular importance if one wants to implement very high performance in a street-legal vehicle. The advantage of titanium is that its thermal expansion is very similar to the very low thermal expansion of a ceramic disc, unlike any other metal, and also features a superior ratio of both stiffness and strength to weight which holds up well even at very high temperatures. The deciding factor for a stable braking behavior - and thus for the safe and superior drivability in every driving situation - is the distribution of the wheel contact force between front and rear axles.
During braking, the front axle load increases and the rear axle load decreases which can quickly lead to critical driving situations when the relief of the rear axle is too strong. Not so with the Veyron, because here the maximum front axle weight is just 60 percent, so even with the strongest braking maneuver, 40 percent still remain on the rear axle.
When the brakes are activated, the rear wing angles up in a little less than 0. The result: the Veyron remains impressively stable, even when approaching curved sections at very high speeds, requiring a considerable slowdown, or when a suddenly swerving or lane-changing vehicle requires heavy braking on the fast Autobahn. Even the best brakes require a lot of air in order to properly function over many braking cycles. Due to the very slight discs and calipers, and the resulting low mass, the components feature a rather low heat capacity.
The inflowing air from the front is caught by a shallow, funnel-shaped carbon fiber channel whose inlet extends over almost the entire width of the vehicle front and is initially directed to the center of the front end. From there a part of the existing air is branched off in order to cool down the battery and the front differential.
The larger portion of the air flow passes through brake cooling hoses to the swivel bearings. Inside of these is a spiral-shaped channel which accelerates the air flowing from the air hoses in the direction of the rotating disks and guarantees a low-loss transfer from the swivel bearings to the rotating disks.
As for the body itself, a stall of the airflow is brought about deliberately in front of the wheel wells which causes the air to be sucked from the rims and the wheel wells, and thus causes a very good discharge of the brake cooling airflow which is strongly heated in the disk. Cooling is an extremely important aspect of the Veyron.
During combustion, some 2, HP of additional heat is generated for every 1, HP of drive power. To cope with this, the Bugatti engine has two water circuits. The largest circuit contains 40 liters of coolant water in three coolers in the front section of the vehicle to keep the engine at operating temperature.
The vehicle has five separate cooling circuits. The oil is cooled by three oil coolers on the sides of the vehicle, which are supplied with cool air via inlets behind the doors. Two of the three oil coolers are located on the right-hand side relative to the direction of travel , while the third is on the left. The entire water cooling system — comprising a high-temperature and a low-temperature circuit — is located in the front end of the vehicle. The vehicle also has an oil-to-water heat exchanger to cool the hydraulic oil and two liquid-to-air heat exchangers to cool the charged air.
The gearbox uses dry sump lubrication, enabling targeted pumping of the full volume of oil through the gear oil tank and gear oil cooler, which are both located on the right-hand side of the vehicle. The rear axle differential also has an active oil cooling system. The corresponding cooler is located on the right relative to the direction of travel behind the gear oil cooler. Like the gearbox, the engine uses dry sump lubrication.
In order to ensure an ideal operating temperature at all times, the engine has both water and oil cooling systems. The engine oil tank and engine oil cooler are located on the left relative to the direction of travel.
The engine water circuit, also known as the high-temperature circuit, comprises three radiators in the front end of the vehicle: a large central radiator and two smaller side radiators. The two side radiators can be sealed off from the rest of the circuit by a thermostat in order to quickly reach the ideal operating temperature. The water is pumped to the front end of the vehicle and cooled down by inflowing air.
The design ensures that the charged air is always being cooled, even when the vehicle is stopped. This enables, for example, a hot start with full engine power on days with high outdoor temperatures. The design of the car offers optimum aerodynamic properties in this speed range. In order to increase downforce and reduce wind resistance, the front of the car is lowered by 90 mm and the rear by mm. At the same time, the front diffuser flaps open. The rear wing and additional rear spoiler are fully extended to support the turning dynamics.
This mode must be enabled with the top speed key before driving. The steering is restricted, and the car is lowered even further. The front diffuser flaps close again, and the rear spoiler and wing are retracted. In less than 0. The maximal air resistance that this creates and the strong rear downforce increase the deceleration values from 1.
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