SPR15e Diana

Season 2015

The 5th generation e-car

100 kW

Motor power

1170 Nm

Torque

220 kgs

Total weight

Engine

1x YASA-750 brushless DC Motor
Control system: Sevcon Gen4.Size8 and dSpace MAB II
LiPo battery (90S2P, system developed in-house, 6.6 kWh, 46 kg)
Completely self-developed BMS (slave boards in the HV battery, master implemented in MAB)
Oil cooling with OptiCool fluid (all components in series)

Gearbox

Power transmission via tripods
CFRP drive shafts
Differential: Drexler Formula Student
Planetary gearbox (1.56 : 1)

Suspension

V: Push-Rod with air spring damper (variably adjustable)
H: Push-Rod with air spring damper (variably adjustable)
Wheel suspension: Double wishbone made of CFRP
Tire manufacturer: Hoosier
Rims: OZ Racing
Steering: Linear Formula Seven steering gear

Electronics

CAN bus
Freely configurable HMI (Human Machine Interface)
Optimized cable routes (automotive standard)
Replaceable wiring harness
LV: 12V
WLAN/GSM live telemetry
Self-developed traction control

Chassis

Structurally analyzed, MIG/MAG-welded tubular lattice frame
Material: E235/E355
Fire Wall: 0.5mm GRP laminated with UL94V0 resin
Crashbox: Aluminum honeycomb
Aerodynamically optimized CFRP-GFRP outer skin

Aero

Newly developed aerodynamics package
Lap time gain: approx. 8%
Front & rear wing
Underbody
Aerodynamic efficiency: 2.1
Automatic DRS (Drag Reduction System) in the rear wing
More contact pressure thanks to side boxes

A racing car rarely drives alone.