Lamborghini has unveiled particulars of its HPEV (Excessive Efficiency Electrified Car) hybrid tremendous sports activities automobile, LB744. Its new powertrain delivers greater than 1000 CV because of the mixture of an inner combustion engine with three electrical motors and a double clutch gearbox.
The brand new L545 engine has a capability of 6.5 liters and is the lightest and strongest 12-cylinder engine ever made by Lamborghini.
The naturally-aspirated 6.5-liter V12 mid-mounted engine is accompanied by three electrical motors, one among which is built-in into the brand new double-clutch eight-speed gearbox. That is mounted transversely and positioned for the primary time behind the combustion engine.
A lithium-ion battery replaces the transmission tunnel, powering the electrical motors. The electrical motors increase energy supply at low revs and can even flip the brand new LB744 right into a purely electrical automobile.
The air consumption ducts to the cylinders have been re-engineered to extend the provision of air and assure optimum airflow within the combustion chamber. The combustion throughout the precise engine has additionally been optimized, due to the regulation of ionization within the chamber with two management items: an answer already used within the Aventador and now transferred to the brand new mannequin.
The brand new combustion system can be characterised by an elevated compression ratio of 12.6:1, and the fluid dynamics of the exhaust have additionally been improved to scale back counter-pressure at excessive revs and improve the particular energy output.
In addition to the interior combustion engine that gives energy to the rear wheels, a pair of electrical motors now make their debut on the entrance axle, every supplying traction to one of many entrance wheels. There’s additionally a 3rd electrical motor positioned above the eight-speed double-clutch gearbox that may provide energy to the rear wheels, relying on the chosen driving mode and the situations.
The 2 electrical motors on the entrance are oil-cooled axial flux items and supply a weight-to-power ratio of 18.5kg from every of the 110 kW items.
In addition to offering energy to the entrance wheels, additionally they have a torque vectoring perform, optimizing driving dynamics, and recuperating the vitality produced beneath braking. When in electrical mode, the LB744 is front-wheel drive solely to optimize vitality consumption, whereas electrical drive to the rear axle is activated on demand when wanted.
The Lamborghini LB744 is supplied with a lithium-ion excessive particular energy (4500 W/kg) battery pack located throughout the central tunnel, conserving the middle of gravity as little as potential and guaranteeing optimum weight distribution. The battery is protected by a decrease structural layer and is related to the entrance electrical motors, the rear electrical motor, and an built-in recharging unit.
The battery is 1550mm lengthy, 301mm excessive, and 240mm large, containing pouch cells with an general capability of three.8 kWh. When the cost drops all the way down to zero it may be recharged utilizing each extraordinary home alternating and charging column present as much as 7 kW in energy, and utterly recharges in simply half-hour. It will also be recharged beneath regenerative braking from the entrance wheels or instantly from the V12 engine in simply six minutes.
Lamborghini has developed a brand new compact transmission unit, a moist double clutch able to managing the 725 Nm of torque at 6750 rpm from the interior combustion engine. The event of an eight-speed Double Clutch Transmission (DCT) comes from the will to create a unit that gives every part wanted for sporty driving resembling quick gear shifts, whereas the inclusion of an eighth ratio helps optimize gas consumption and drivability whereas cruising.
How the system features is determined by which driving mode is engaged, due to an uncoupling mechanism with a devoted synchroniser permitting the connection to the double-clutch gearbox.
When it’s offering further energy to the V12 inner combustion engine, the electrical motor is in P3 place, separated from the gearbox, whereas it strikes into the P2 place to recharge the battery at low speeds and when parked, additionally serving a starter motor.Within the P3 place, the LB744 can turn out to be an electrical four-wheel drive automobile, relying on the drive mode chosen, persevering with Lamborghini’s four-wheel drive custom even with zero emissions.
Reverse gear is offered by the 2 entrance electrical motors, though if additional momentum is required the rear electrical motor can even kick in, which prompts the rear axle and wheels. Because of this, the brand new LB744 can drive all 4 wheels in zero emission mode even when reversing in low grip situations.