Ferrari SF90 Stradale Features

The SF90 Stradale is the first ever Ferrari to feature PHEV (Plug-in Hybrid Electric Vehicle) architecture which sees the internal combustion engine integrated with three electric motors, two of which are independent and located on the front axle, with the third at the rear between the engine and the gearbox.

The internal combustion engine and the electric motors work in synergy to unleash an incredible 1,000 cv which means the SF90 Stradale sets a whole new benchmark in terms of its performance and innovative content not just with regard to the Ferrari range, but also its competitors.

The exceptional work done to boost the power unit’s power would have all been in vain without in-depth dynamics research and the development of a whole series of solutions to boost the SF90 Stradale’s lap times, whilst simultaneously guaranteeing that drivers of all kinds could make full use of the car’s potential and have fun behind the wheel.

The new hybrid architecture required extensive and lengthy integration work on the car’s many different control logics. The three areas concerned are: the high-voltage system controls (battery, RAC-e, MGUK, inverter), engine and gearbox control and vehicle dynamics controls (traction, braking, Torque Vectoring).

Integrating these areas with the existing vehicle control logics led to the development of the new eSSC (electronic Side Slip Control) vehicle control system. The eSSC introduces three innovative dynamic regulation and distribution strategies for engine torque to all four wheels:

- Electric Traction Control (eTC): optimally manages the availability of the torque – both ICE and electric – distributing it to the individual wheels to suit driving conditions and grip requirements

- brake-by-wire control with ABS/EBD: allows the braking torque to be split between the hydraulic system and the electric motors (brake torque blending), allowing regenerative recovery under braking which actually boosts performance and brake feel rather than compromising them

- Torque Vectoring: available on the front axle to manage electric traction on outside and inside wheel in cornering to maximise traction exiting the corner and help ensure easy, confident, high-performance driving.

The greatest challenge in crafting the aerodynamics of the SF90 Stradale was posed by the need to deliver downforce and aerodynamic efficiency at a level never before achieved either by Ferrari or its competitors, whilst simultaneously guaranteeing that all the subsystems of the new power unit (internal combustion engine, electric motors, battery and inverters) would always function as optimally as possible.

As always, the aerodynamics department worked closely with Ferrari Design and this produced downforce and efficiency figures unmatched by any other car in the segment. Once again, they were achieved in typical Ferrari fashion: rather than using simple add-on elements, the car’s forms were meticulously sculpted.

The results in terms of performance are impressive indeed: thanks to its ability to generate 390kg of downforce at 250 km/h, the SF90 Stradale is now the new benchmark for downforce and efficiency in high-performance road cars.

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