Audi unveiled the newly developed Audi e-tron FE05 for the ABB FIA Formula E Championship. Because of the new electric racers’ greater range, the drivers will compete with only one race car for the first time. Because the batteries now have the capacity to last the entire 45-minute race distance, the mandatory car change during the race has been eliminated. This is a testimony to how motorsport—especially Formula E—is advancing innovations and technology.
While the rest of the car is identical for all teams, manufacturers get the opportunity to showcase their technical expertise with the drivetrain. In the fourth season of the all-electric race series, which concluded with Audi Sport ABT Schaeffler winning the teams’ title in New York mid-July, the Audi e-tron FE04 very often proved to be the most efficient car. Its successor is an evolution of this winning model.
The motor generator unit, dubbed the Audi Schaeffler MGU03, was jointly developed by Audi and its technology partner Schaeffler. Engineers put particular emphasis on making the package even more efficient and further increasing its level of effectiveness.
95% of the drivetrain parts are new and the engineers were able to shave 10% off the weight.
Summerscale and his team began developing the Audi e-tron FE05 as early as mid-2017, even before the start of last season. By the end of July 2018, the Fédération Internationale de l’Automobile (FIA) had homologated the car. Changes are no longer permitted, only the software may be improved during the season. A joint test with all of the competitors is scheduled for mid-October in Valencia, Spain. Afterwards, the race cars and equipment will be transported to Saudi Arabia.
For the fifth season of Formula E, the motor is permitted to produce up to 250 kW (340 horsepower) in qualifying. In the race, the output is capped at 200 kW (272 horsepower). New are the activation zones: When drivers pass through this zone on the racetrack, they can briefly access a higher power mode of 225 kW (306 horsepower). Formula E fans can still support their favorite driver by casting their vote online via “FanBoost,” which gives drivers a temporary power boost of up to 250 kW (340 horsepower).
All Formula E teams draw electricity from identical McLaren batteries weighing 374 kilograms. The lithium-ion battery is mounted between the driver’s seat and the powertrain. It has a capacity of 52 kWh and can be charged within 45 minutes.
A completely new development for the fifth season is the “Brake-by-Wire” system. Brake control and transmission to the rear axle are decoupled from each other and electronically controlled. The brake balance is therefore always optimally distributed and recuperation becomes even more efficient.
Like in Formula 1, the driver sits in a monocoque made of carbon-fiber, developed to comply with FIA safety standards. CFRP crash structures at the front, rear and sides provide maximum safety. Also new—analog to Formula 1—is the halo system above the cockpit which provides additional protection for the drivers’ heads.
The minimum weight of a Formula E race car is 900 kilograms (including the driver). The electric race car accelerates from 0 to 100 km/h in 3.1 seconds. Top speed is achieved at around 240 km/h.
The new generation of the Audi e-tron FE05 comes without a rear wing—a rarity in motorsport. Instead, downforce is generated by a large diffuser at the rear of the race car.
In addition to the Audi works team, the British squad Virgin Racing fields Audi e-tron FE05 race cars for the first time in the 2018/2019 season. This partnership is new for the fifth season, with a healthy competition between the two teams intended to continually increase the performance level.
The Audi Sport ABT Schaeffler team is a founding member of Formula E with Daniel Abt and Lucas di Grassi competing since the very first race. The Brazilian clinched the title in the drivers’ championship in the third season (2016/2017). The 2017/2018 season concluded with di Grassi as the runner-up and Abt in fifth place.
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