Lamborghini reveals new V12 Engine

Posted on November 15, 2010

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A milestone in the history of Lamborghini: The new twelve-cylinder and the new ISR transmission – Innovative technologies for a unique powertrain

Automobili Lamborghini is embarking on a highly innovative chapter in the company’s history with an all-new V12 power plant and a new, unique high performing seven speed transmission: The twelve-cylinder with 6.5 liters displacement, output of 525 kW (700 hp) and maximum torque of 690 Newton meters was developed with state-of-the-art technology from a white sheet of paper. The result is a synthesis of breathtaking performance, high-revving exhilaration, low weight and moderate gas emissions. The perfect complement is a completely new transmission concept for super sports cars: The “Lamborghini ISR” automated manual gearbox combines minimal shift times and everyday convenience with low weight and dimensions to guarantee the emotional gearshift that customers expect from a super sports car at the very top of the premier league. The new powertrain will enter production early 2011.

The legend of Lamborghini strongly relies on its extraordinary, unique V12 engines.”This new power unit is not only the crowning glory of our product lineup, it is also part of our enormous investment in the future of the Lamborghini brand,” says Stephan Winkelmann, President and CEO of Automobili Lamborghini. “With this new V12, we are heralding a technological leap that encompasses all areas of the company and our future model range. With a unique package of innovations, Lamborghini will redefine the future of the super sports car. This 700 hp engine, together with an all-new concept gearbox, will be at the heart of the Murciélago successor next year.”

The new V12 power unit –
The heart of Lamborghini

The twelve-cylinder is the king of the engine world and the true heart of the Lamborghini brand. The very first model created by Feruccio Lamborghini, the 350 GT, made its appearance in 1964 featuring a twelve-cylinder engine that was incredibly innovative for its day. 3.5 liter displacement and 320 hp were the vital statistics back then – they formed the basis for ongoing increases and further development over the decades that followed. Miura, Espada, Countach, Diablo and, finally, Murciélago are just a few of the super sports cars born in Sant’Agata. All of them were, and will continue to be, driven by V12 engines – and all have long since risen to the status of automotive legend.

Now the next milestone in this glorious history appears – engineers in the Lamborghini R&D Department have developed a completely new high-performance power unit. That it would be another twelve-cylinder was never in doubt – and not only because of the special magic conjured up by the number twelve. The only real choice for Lamborghini is a high-revving naturally aspirated engine – the deeply reflexive and exceptionally powerful reaction of the automobile to the tiniest movement of the driver’s right foot is, of course, a key part of the whole fascination inspired by a super sports car. Ten cylinders are ideal in the displacement class around the five liter mark, as evidenced by the highly acclaimed Gallardo engine. For the 6.5 liter displacement targeted in this case, the perfect number is twelve. A lower number of cylinders would result in larger and heavier pistons and con-rods, which would have a negative impact on the engine’s high-revving characteristics.

Starting with a clean sheet of paper

The specification for the development of the new twelve-cylinder, known internally as the L539, was written quickly – yet was highly demanding in its formulation. Naturally, it had to deliver more power and torque than its predecessor in the Murciélago, but it should also be smaller and lighter and enable a lower center of gravity. At the end of the day, low weight is just as important to the performance of a super sports car as high power output. Fuel consumption and gas emissions should also be reduced significantly.

So the R&D team started with a clean sheet of paper – metaphorically speaking, of course. Design and development in Sant’Agata is conducted using state-of-the-art systems and equipment. The outcome is a V12 with a classic cylinder bank angle of 60 degrees, and thus an amazingly compact power package – the power unit measures only 665 millimeters from top to bottom, including the intake system. Its width, including the exhaust manifold, is only 848 millimeters, while its length is a mere 784 millimeters. Its weight of 235 kilograms is also respectably low – each kilogram of engine weight corresponds to 3.0 HP maximum output.

Optimized for high revving and low weight

The crankcase on the new power plant is made from an aluminum-silicon alloy and has an open-deck construction with steel cylinder liners. Displacement is 6,498 cm3 and cylinder spacing 103.5 millimeters, while bore diameter measures 95 millimeters and stroke 76.4 millimeters. The short-stroke layout is especially good for high-revving characteristics and for low internal friction. Particular attention was also paid to the bearings for the forged and nitride-hardened crankshaft, which weighs in at 24.6 kilograms.

The two four-valve cylinder heads are likewise made from sand-cast aluminum-silicon alloy, each weighing a very light 21 kilograms. The twelve pistons and con-rods are, respectively, in forged alloy and steel. The maximum piston speed at 8,250 rpm is only 21 meters per second, which is considerably less than for the Murciélago’s previous power unit. The combustion chambers were carefully engineered to achieve optimum tumble and combustion of the fuel/air mixture. At 11.8:1, the compression ratio is extremely high. Inlet and outlet valve timing is electronically controlled.


Source: Lamborghini via worldcarfans

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