Worlds Fastes car
The fastest road sports car in the world, one of the most ambitious projects in automobile history, entered the production phase after ages of development time. The Bugatti Veyron 16.4, built mainly by hand, finally reached its original goal, packing 1001 hp under its hood, or 987 hp in SAE numbers.
The sports car, capable of more than 250 mph, is driven by a 16-cylinder mid-engine, that at 710 mm long is no larger than a conventional V12 unit, and due to its lightweight construction weighs only about 400 kilos. Its compact dimensions are due to the unique arrangement of its cylinder banks in a W configuration. Two VR8 blocks, each with a fifteen degree bank angle, are joined in the crankcase to form one engine. Both eight cylinders are set at an angle of ninety degrees to each other and are aspirated by a total of four exhaust gas turbochargers. The engine delivers 987 hp at 6000 r.p.m. and provides a maximum torque of 923 lb-ft at between 2200 and 5500 r.p.m.
To apply the power of the 64-valve unit to achieve satisfactory driving dynamics both in everyday traffic and on the racetrack, the Bugatti development team of Dr. Franz-Joseph Paefgen and Dr. Wolfgang Schreiber has realized a propulsion unit that is without parallel in its complexity. If the extreme engine power is a master stroke of genius, its conversion for road use is an equally tough challenge. As Dr. Schreiber says “For 1000 hp propulsion power, the system demands approximately 2000 hp to be additionally generated as heat energy during combustion. Half in each case is dissipated in the exhaust gas and cooling water”. To do this, the Bugatti engine has two water circuits. The larger of the two with 40 liters of cooling water has three coolers in the front section of the car, to keep the engine at operating temperature. The second circuit, called the low-temperature system, has a separate water pump and contains 15 liters of cooling water. These are used to cool, by up to 130 degrees, the charged air, heated during compression in the turbochargers, in two heat exchangers mounted on the engine. The cooled, charged air then passes through two “air manifolds” into the combustion chamber, which it then leaves as exhaust gas at approximately 1,000 degrees. It then passes through the turbines of the exhaust gas turbochargers. This causes the exhaust gas to expand, so that it is cooled by up to about 150 degrees, is then cleaned in the catalyzer and exhausted.
In addition to its unique compactness, the high performance of the power unit is the centrepoint of the development. Lightweight materials are used that not only result in a low power-to-weight ratio but also particularly provide the spontaneous response of the moving engine-internal masses. In addition to piston rods of titanium, the so called “easy runners”, the eight-stage oil pump integrated into the crankcase for dry sump lubrication has light aluminum gears. Because the arrangement of the 16 cylinders ensures extremely quiet running, only a small flywheel is needed. The use of motor sport technology is evident not only from the plasma-coated running faces of the cylinders but also by the use of high-strength steel for the shafts and gears in the aluminum crankcase.
The sports car, capable of more than 250 mph, is driven by a 16-cylinder mid-engine, that at 710 mm long is no larger than a conventional V12 unit, and due to its lightweight construction weighs only about 400 kilos. Its compact dimensions are due to the unique arrangement of its cylinder banks in a W configuration. Two VR8 blocks, each with a fifteen degree bank angle, are joined in the crankcase to form one engine. Both eight cylinders are set at an angle of ninety degrees to each other and are aspirated by a total of four exhaust gas turbochargers. The engine delivers 987 hp at 6000 r.p.m. and provides a maximum torque of 923 lb-ft at between 2200 and 5500 r.p.m.
To apply the power of the 64-valve unit to achieve satisfactory driving dynamics both in everyday traffic and on the racetrack, the Bugatti development team of Dr. Franz-Joseph Paefgen and Dr. Wolfgang Schreiber has realized a propulsion unit that is without parallel in its complexity. If the extreme engine power is a master stroke of genius, its conversion for road use is an equally tough challenge. As Dr. Schreiber says “For 1000 hp propulsion power, the system demands approximately 2000 hp to be additionally generated as heat energy during combustion. Half in each case is dissipated in the exhaust gas and cooling water”. To do this, the Bugatti engine has two water circuits. The larger of the two with 40 liters of cooling water has three coolers in the front section of the car, to keep the engine at operating temperature. The second circuit, called the low-temperature system, has a separate water pump and contains 15 liters of cooling water. These are used to cool, by up to 130 degrees, the charged air, heated during compression in the turbochargers, in two heat exchangers mounted on the engine. The cooled, charged air then passes through two “air manifolds” into the combustion chamber, which it then leaves as exhaust gas at approximately 1,000 degrees. It then passes through the turbines of the exhaust gas turbochargers. This causes the exhaust gas to expand, so that it is cooled by up to about 150 degrees, is then cleaned in the catalyzer and exhausted.
In addition to its unique compactness, the high performance of the power unit is the centrepoint of the development. Lightweight materials are used that not only result in a low power-to-weight ratio but also particularly provide the spontaneous response of the moving engine-internal masses. In addition to piston rods of titanium, the so called “easy runners”, the eight-stage oil pump integrated into the crankcase for dry sump lubrication has light aluminum gears. Because the arrangement of the 16 cylinders ensures extremely quiet running, only a small flywheel is needed. The use of motor sport technology is evident not only from the plasma-coated running faces of the cylinders but also by the use of high-strength steel for the shafts and gears in the aluminum crankcase.
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6:35 AM
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