The former, developing 100kW, acts as an electric motor under acceleration and a generator to recuperate kinetic energy under braking, with the latter rated at 80kW used to electrically power the petrol engine’s turbocharger for instant response as well as to convert heat from the turbocharger into electrical energy for storage in the new car’s sophisticated battery.
Together, the combustion engine and the rear-mounted electric motors provide drive exclusively to the rear wheels.
Channelling the Project One’s heady reserves is a an eight speed automated manual gearbox that acts as a structural bearing element within the driveline at the rear of the engine, where it supports an intricate five-link rear suspension featuring pushrod style spring and damper units.
In a departure from the German car maker’s rear-wheel drive F1 race car, the new headlining AMG model’s front wheels can be driven individually by two electric motors and a pair of fixed ratio gearboxes mounted within the front axle assembly with torque distributed selectively to the wheel with the most grip – a layout mirroring that of the earlier pure electric Mercedes-AMG SLS Electric Drive to provide the Project One four-wheel drive capability. Called AMG Toque Dynamics, the electronically control system mimics the rear wheel torque vectoring effect seen on other less extreme four-wheel drive AMG models.
The two front mounted electric motors deliver a combined 240kW exclusively to the front wheels, providing the Project One with a claimed range of up to 25km in pure electric mode, according to Moers. When required the MGU-K can also provide electric drive to the rear wheels, essentially endowing it with pure electric four-wheel drive capability.
The battery used to power the Project One’s four electric motors is based on the same lithium ion cell technology found in the Mercedes-Benz F1 racer. Boasting four time the energy density as the battery used in the race car, it is mounted low towards the front of the floor structure, providing it a favourable front-to-rear weight distribution and low centre of gravity.
All up, the advanced new plug-in hybrid system is claimed to weigh 420kg, with the batteries adding a further 100kg. Moers is tightlipped on the Project One’s overall kerb weight but admits earlier claims suggesting it will tip the scales under 1000kg are premature. “There are a lot of regulatory factors to consider. We have to build in all the safety features, including crash structures,” he says.
Engineering for the Mercedes-AMG hypercar is being carried out in a joint program between AMG in Affalterbach, Germany and its High Performance Powertrain sister company located in Brixworth, England.