FSE.X

The 2021 season meant a completely new concept of the car for the piloted division of the team. The battery is now located under the pilot’s feet, and thanks to a better distribution of the other units in the car, we have reduced the moment of inertia by 12%. Lighter and shorter, by a significant 45 centimeters, it is a carbon monocoque with a sandwich structure carrying a completely new chassis together with the wheel structure.

The motors are now located directly in all four wheels. Changes to the traction system did not end with the placement of the Battery. It could be lightened thanks to the use of energy recovery. The system now operates at a higher maximum voltage of 600V.

195 kg

WEIGHT (WITHOUT DRIVER)

141,5 kW

MAXIMUM POWER (RESTRICTED TO 80 kW BY THE COMPETITION RULES)

49,5 : 50,5 %

Weight distribution (front: rear)

Dimensions
Wheelbase
  • 1525 mm
Track width
  • 1200 mm
Vehicle weight without driver
  • 195 kg
Weight distribution (front: rear)
  • 49,5 : 50,5 %
Frame
  • Sandwich structure composite monocoque made of carbon fabric with aluminum honeycomb and ROHACELL® foam core with chromium molybdenum high strength steel main hoop and TIG welded aluminum front hoop
Handling
Suspension
  • Independent all-wheel suspension
  • Double A-arms of unequal length on both axles
Damping
  • Push-rod type on both axles
  • Öhlins TTX 25 FSAE shock absorbers
Rims
  • Aluminum 10 ″ – Keizer
Tires
  • Hoosier 16×7,5-10 LCO
Brake system
  • Disc brakes on all wheels, 2-circuit system
  • Adjustable brake bias
  • 200 mm front and rear discs, ISR Racing calipers
Powertrain
Motor
  • Synchronous PM Fischer motors (4x 35,37 kW)
  • Maximum torque: 29,1 Nm
Inverter
  • Lenze
Maximum speed
  • 20000 rpm
Maximum power
  • 141,48 kW / limited to 80 kW according to Formula Student rules
Maximum torque
  • 1450 Nm to 60 km/hod
Transmission
  • Planetary two-stage transmission (i = 13,3)
Differential
  • Active electronic – each motor is controlled separately
Cooling
  • Water cooling of motors and power electronics, two cooling circuits
Battery pack
  • Cells Melasta – electrical configuration 144s2p

  • Total energy 7,45 kWh – maximum voltage 604,8 V, limited to 600 V by the rules

  • Own battery monitoring and management system

  • Own power and measuring electronics

  • Self-supporting structure – a sandwich composite of carbon and glass fibers that meet the fireproof standard
Electronics
CAN bus
  • CAN1 : Data required for driving (pedal position, safety features, battery data, wheel sensors, steering wheel, etc.)
  • CAN2 : Data from the remaining sensors (temperature, diagnostic data, etc.)
Traction control
  • All wheel slip control
INS unit
  • inertial navigation system
  • Data acquisition for traction control
  • Possibility of more detailed driving analysis
Pedal unit
  • Evaluation of pedals by independent sensors
  • Safety functions
Steering wheel unit
  • Own GUI
  • Touch screen
  • Display of diagnostic data

Dashboard
  • Continuous display of important data (battery status, electrical protection status)

Automatic control
  • Automatic regulation of fan speed, power limitation at low battery charge, etc.

Achievements

Overall (FS Spain)
Overall (FS Alpe Adria)
Endurance (FS Alpe Adria)

Autocross (FS Spain)
Endurance (FS Spain)

Business plan (FS Alpe Adria)
Acceleration (Baltic Open)

Achievements

Autocross (FS Spain)
Endurance (FS Spain)

Overall (FS Spain)
Overall (FS Alpe Adria)
Endurance (FS Alpe Adria)

Business plan (FS Alpe Adria)
Acceleration (Baltic Open)

Team members

Josef Med

Team Captain

Ing. Vít Hlinovský, CSc.

Faculty Coordinator

Project group

Miroslav Martínek – group leader
Kateřina Antošová
Adam Čumrda
Jiří Harman
Adéla Kubíková
Pavla Lásková
Tomáš Omasta
Adam Petráň
Jan Pivoňka
Tereza Plšková
Jakub Žižka

Electronics group

Michal Kopiar – group leader
Richard Ciglanský
Kryštof Cikhart
Jakub Dvořák
Martin Edl
Petr Hainc
Martin Hejl
Šimon Hykl
Vojtěch Kotrba
Jan Kučera
Filip Machulda
Vojtěch Michal
Tomáš Nekvapil
Anastas Nikolov
Egor Pushkin
Michal Riecher
Lukáš Strašík
Ondřej Šereda
Jiří Štengl
Jan Veselý
Vojtěch Vosáhlo

Mechanical group

Jakub Sedlář – group leader
Matěj Crhán
Ilya Chaban
Kryštof Jirásek
Matouš Kmet
Lukáš Kolbaba
Petr Kolovrátník
Josef Kopecký
Tomáš Krejčí
Josef Med
Robert Němec
Jan Plesník
Vojtěch Šestořád
Radek Štěpánek
Ondřej Štogl
Jiří Teichman
Ondřej Velínský
Jiří Zubr
Ján Cába

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