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Lamborghini engineers have also concentrated on improving torque development. The "drivability" of the engine is enhanced by a continuous variable timing system (intake and exhaust side) and a drive-by-wire engine management system.
To meet the thermal requirements of the engine, the engineers have foreseen a considerably larger oil radiator and subsequently, the air intake on the left side of the vehicle has been enlarged. The liquid cooling system, characterised by the Lamborghini VACS system (variable geometry air inlet system) remains the same. Electronically managed air intakes open depending on the outdoor temperature and the need for cooling air, ensuring maximum aerodynamic efficiency.
Gearbox and transmission: improved efficiency and strength
More power and higher torque call for superior gearbox component performance. To meet these new demands, the new Lamborghini Murcielago LP640 features a modified six-ratio gearbox as well as a tougher rear differential and new axle shafts. On request, the e-gear automatic gearbox is also available equipped with the new dedicated "Thrust" (acceleration programme) mode.
Just like its predecessors, Lamborghini Murcielago LP640 features permanent four-wheel drive, based on the reliable Lamborghini VT (Viscous Traction) system. The system is self-governing and does not feature any electronic controls. The drive force is usually divided between the front and rear axles in the ratio of 30 to 70. An independent control circuit adjusts the distribution of the drive force depending on dynamic oscillation, weight distribution and the relative friction factor in perfect synchronisation with the Visco clutch. In extreme cases, up to 100% of the drive force can be applied to a single axle.
Lamborghini Murcielago LP640 Electronics: a "closed loop" for total control
The electronics have also been updated. The modified engine control units improve engine performance and "driveability" thanks to "closed loop" control.
Every engine and vehicle parameter is managed and controlled by three "master" control units and a "satellite" control unit. The master control units consist of two Lamborghini "LIE" engine control units, a Lamborghini "GFA" (Auxiliary Function Management) control unit and a Lamborghini "PMC" (Power Motor Control) satellite control unit. The control units are interconnected by a CAN Bus line.
Frame and chassis: perfect harmony
The body of Lamborghini Murcielago LP640 with its characteristic scissor doors is created from the prized union of sheet steel and honeycombed carbon fibre, glued and riveted together.
Driving, handling and stability at high speed are enhanced by new springs and stabilisers, as well as by a redesigned electronically controlled damper. The "anti-dive" and "anti-squat" features on the axles, which efficiently prevent so-called "brake diving" and "squatting", have not been changed.
The two springs on every rear wheel, the single spring on every front wheel and the damper are placed coaxially.
The new aluminium "Hermera" rims measure 81/2" x 18" (fore carriage) and 13" x 18" (rear axle). The vehicle can be fitted with various sized Pirelli P Zero "Rosso" tyres. Lamborghini Murcielago LP640 features 245/35 ZR 18 front tyres and 335/30 ZR 18 rear tyres. For sports use, especially on racetracks, Lamborghini provides optional Pirelli P Zero "Corsa" (Race) tyres. Pirelli P "Sottozero" (Sub zero) winter tyres are currently being developed.
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