This is how Bugatti tests the performance of the Chriron Super Sport

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This is how Bugatti tests the performance of the Chriron Super Sport

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    It has a torque of 1,600 Nm, 1,600 hp and reaches 440 km/h thanks to the famous 8.0-liter W16 engine. The Bugatti Chiron Super Sport is the most powerful and fastest production supercar in the world thanks to the fact that it exceeded the official records in a test carried out in the summer of 2019. Specifically, it reached 490,484 km/h.

    To achieve this high level of performance, Bugatti carries out different tests, such as the one shown in the attached video. It is a test on rollers that allows verifying the power that is transmitted to the wheels and the real maximum speed.

    Bugatti Chiron Super Sport performance

    In this test bench each wheel acts on one large roller instead of two small ones. As explained by Bugatti, the advantage of this configuration is that each wheel has a single point of contact, something similar to what happens on the road and in this way the test is more similar to real driving situations.

    Another benefit is that wheel slip, flex and performance loss are also reduced compared to a two-roller dynamometer. Therefore, the tires heat up less, which allows higher speeds to be reached.

    In fact, records of up to 400 km/h are possible, a level of speed that the Chiron Super Sport reaches effortlessly, they say at Bugatti, but the tires suffer from the effort given that they are turning more than 50 times per second. A pressure is exerted on the tread that is approximately 4,000 times that of the gravitational acceleration (g = 9.81 m/s2).

    The dimensions of the dynamometer are enormous given that a set of rollers weighs 3.5 tons and the rotating mass is around 720 kilograms, similar to that produced by a moving vehicle. Likewise, the rear axle roller can be adapted thanks to a hydraulic system to the wheelbase.

    Another feature is that with a maximum braking power of 1,200 kW per roller, speeds of up to 480 km/h can be simulated, and the vehicle can still brake safely.

    Since the car does not move, cooling becomes critical, which makes it essential to have high-power fans. In this case, there is one that is four meters high and has a 1.93 meter diameter rotor that allows it to generate 300,000 cubic meters of air per hour at a speed of up to 230 km/h. Therefore, the installation simulates realistic air currents even at very high speeds.

    roller test

    This airflow varies with driving speed and provides the necessary cooling to the engine and underbody to reach areas such as the exhaust system, transmission and differential. The extraction of the exhaust gases is done from below and is conducted to the outside through 12.5-meter towers equipped with large extractors.

    For the test with the Super Sport a special fastening system was created, given the potential of the car. It includes a structure with four individual adapter plates under the carbon monocoque. This secures the car securely to the dynamometer: 20 high-strength bolts in the underside of the bodywork attach the plates to the monocoque. In addition, each of the plates is linked to the others with intersecting chains and anchored to the ground. The chains can withstand a pulling force of up to 24 tons. Finally special straps on the sides at the rear fix the car in place so that the tires are in permanent contact with the roller.

    “This means that we can guarantee free and, above all, safe operation, even at full load and top speed,” explains Michael Gericke, Engine Developer at Bugatti, who adds: “On the all-wheel drive single-roller dynamometer , all components can be tested in real driving conditions in a neutral way Driving resistance levels are simulated that are identical to those on the road”

    “We can also reproduce the tests at any time of the year and regardless of the weather. This helps us in our permanent search for technical perfection,” he says. In addition to performance checks, load simulations and acceleration, emissions readings are taken and fuel consumption measurement cycles are performed.

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