SPR12e Elisa

Season 2012

The 2nd generation e-car

100 kW

Motor power

750 Nm

Torque

272 kgs

Total weight

Engine

2x YASA-750 brushless DC motors
Control system: dSpace MAB II + embedded PC
LiPo battery (84S1P, system developed in-house)
Completely self-developed BMS (slave boards in the HV battery, master implemented in MAB)
Oil cooling with OptiCool fluid (all components in series)
Quick, ergonomic LiPo battery changing system

Gearbox

Power transmission via tripods
Direct drive via CFRP drive shafts
Differential: Electronic (Torque Vectoring)

Suspension

V: Push-Rod with 4-way damper (variably adjustable)
H: Pull-Rod with 4-way damper (variably adjustable)
Wheel suspension: Double wishbone made of CFRP
Wheel carrier: AL-7075
Mass distribution (VA/HA) = 106 kg : 166 kg
Tire manufacturer: Hoosier
Rims: OZ Racing
Steering: PSS steering gear with progressive steering angle characteristic

Electronics

CAN bus
HMI (Human Machine Interface)
Optimized cable routes
Replaceable wiring harness
LV: 12V via DC/DC-Konverter

Chassis

Structurally analyzed, MIG/MAG-welded tubular lattice frame
Torsional rigidity: 1420 Nm/deg
Weight: 34.4 kgs
Material: E355
Fire Wall: 0.5mm aluminum with UL94V0 insulation foil
Crash box: Impaxx 700 covered with CFRP
Carbon outer skin
Driver adjustments of up to 100 mm through pedals, seat & steering wheel

A racing car rarely drives alone.