Formula E Powertrain
All details should be treated as preliminary. This document is proprietary and confidential
• McLaren systems supply/integrate all Electronics on the Formula E
racing car.
• Data System, Motor Controller, eMotor, Gearbox, integration with
XAP Steering Wheel/Display, Data Logging, integration with WAE
BMS, data transfer to and from FIA Logger and ADR
• Powertrain starts at receiving DC High Voltage at the Motor
Controller, and ends at the Driveshafts
• Developed from Formula 1 Systems and adapted for the challenges
of Formula E
All details should be treated as preliminary. This document is proprietary and confidential
• TAG-400i controlling Motor, Gearbox and Data Acquisition.
All details should be treated as preliminary. This document is proprietary and confidential
• Standard ECU for Indycar and McLaren GT MP4-12C
• Connected to McLaren Chassis harness
• Controls all car systems
• Gearbox
• Pit Limiter
• Rainlight/Ready To Move light
• Water Pump
• Includes many F1 style safety systems
• Throttle/Brake Overlap
• Gearchange inhibit
• Redundant throttle inputs
All details should be treated as preliminary. This document is proprietary and confidential
• MCU-510 controlling the eMotor.
All details should be treated as preliminary. This document is proprietary and confidential
• Motor Control Unit derived from McLaren P1 Hybrid road car
• Includes many of the Automotive Safety Systems required for road
use
• Water Cooled unit. DC Voltage in, 3 Phase output. CAN Controlled
from ECU.
• Built-in DC/DC Converter to charge 12V Auxiliary battery
• Rated to IP66
All details should be treated as preliminary. This document is proprietary and confidential
• eMotor (derivative of McLaren P1 hybrid motor).
All details should be treated as preliminary. This document is proprietary and confidential
• Based on the eMotor from McLaren P1 Hypercar
• Water Cooled radial motor
• 130Nm maximum torque
• 17,500 maximum rpm
• 200kW maximum battery power
• ~91% efficient (battery to motor shaft)
• Rated to IP67
• Features HVIL to protect users from live areas
All details should be treated as preliminary. This document is proprietary and confidential
• 5 Speed Sequential Gearbox. Hewland supplied, based on F3.
All details should be treated as preliminary. This document is proprietary and confidential
• 5 Speed Sequential Gearbox
• Geared for 225kph
• Splash Lubricated
• Pneumatic Gear change system
• 2:1 input shaft reduction ratio
• Powerflow Differential
All details should be treated as preliminary. This document is proprietary and confidential
• Data Acquisition Sensors
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4 Wheelspeeds (passed via FIA Logger for TC prevention)
4 Damper Position Sensors (Linear Potentiometers)
4 Infrared Brake Disc Temp sensors
Front and Rear Brake pressure
Steering Angle
Cooling Water Temperature and Pressure
Gearbox Oil temperature
Gearbox Pneumatic Air Pressure
Accelerometer and Gyro data taken from ADR (TBC)
Microwave Lap Trigger
3 Channel Throttle Sensor (2 for ECU Control, 1 for FIA Monitoring)
Layshaft and Mainshaft Speeds
All available MCU, Motor and BMS parameters
All details should be treated as preliminary. This document is proprietary and confidential
• Wiring Harnesses – Chassis Loom
C26
Water Pump Power
4 socket DTP
Right angle boots for
both Water pump
connectors. Exiting in
direction of release tab.
310
C27
Water Pump CAN
6 socket DTM
310
Bottom Left
C38
Water Pressure
ASL1-06-05SB-HE
280
C25
Throttle
AS1-10-35SN
510
C28
Brake P F
ASL1-06-05SN-HE
250
C47
Energised LED
ASU6-03-03SN
310
C48
ESS LH
13440AD2G25X1156
C49
ESS RH
13440AD2G25X1156
510
2000
C31
Damper FL
ASL1-06-05SE-HE
510
660
C10
Lap Trigger
FGS0F303YLM
400
C29
Brake P R
ASL1-06-05SB-HE
540
540
C130
Transponder
ASL1-06-05SD-HE
C16
Master Power
AS6-14-97PA
400
400
C17
Fused Power
AS6-12-35PB
C14
MCU Split
AS1-10-35SN
180
C21
Speed FL
ASL1-06-05SN-HE
C51
Brake T FL
ASL1-06-05SB-HE
C30
Steering
ASL1-06-05SC-HE
900
Refer to photo for keyway position
LV1 and LV2 Main
Keyway direction (red
arrow) in direction of boot
900
690
220
C3
ECU Auxillary
AS6-16-35SA
C2
ECU Chassis
AS6-18-35SN
C1
ECU Engine
AS6-16-35SN
C46
FIA Sensor LV2
AS6-12-35SB
C128
RESS Water In
2 Pin Jetronic
1928402078
400
450
240
C7
Dash Split
AS6-12-35SA
C4
FIA Logger
AS6-16-35SN
C5
FIA Logger
AS6-16-35SA
250
C9
Column
AS1-10-35SN
620
530
C126
RESS Water Power
4 socket DTP
150
1000
Right angle boot for
Water pump connector.
Exiting opposite
direction of release tab.
C129
RESS Water Out
2 Pin Jetronic
1928402078
630
630
1200
Bottom
Right
100
200
C101
Spares
AS1-16-35SN
620
C12
IP Dongle
ASL1-06-05SD-HE
C11
Radio
ASL1-06-05SN-HE
1100
530
All details should be treated as preliminary. This document is proprietary and confidential
C52
Brake T FR
ASL1-06-05SB-HE
400
860
550
1000
C6
Rear Split
AS1-14-35SN
400
C13
Fire Unit
ASL6-06-05PN-HE
Top Right
1430
C45
Battery LV1
AS6-12-35SN
ADR boot to be in
direction of master
keyway (as per red
arrow)
C8
ADR
AS6-10-35SN
620
C55
Safety Lights
ASU6-03-05SA
C56
Neutral Switch
ASU6-03-03SA
C22
Speed FR
ASL1-06-05SN-HE
C32
Damper FR
ASL1-06-05SE-HE
• Wiring Harnesses – Gearbox Loom
C26
Speed Mainshaft
ASL1-06-05SB-HE
C28
Shift Down
ASU1-03-03SA
C29
Pressure Release
ASU1-03-03SB
340
310
310
C11
Gbox Oil Temp
ASL1-06-05SD-HE
C23
Speed RL
ASL1-06-05SN-HE
C33
Damper RL
ASL1-06-05SE-HE
C30
Rainlight
620
220
220
220
C53
Brake T RL
ASL1-06-05SB-HE
220
AMP 963040-3
C54
Brake T RR
ASL1-06-05SB-HE
C34
Damper RR
ASL1-06-05SE-HE
C24
Speed RR
ASL1-06-05SN-HE
C16
Gbox Air Pressure
ASL1-06-05SN-HE
330
330
330
330
C15
Gbox Barrel pos
ASL1-06-05SC-HE
C25
Speed Layshaft
ASL1-06-05SA-HE
C27
Shift Up
ASU1-03-03SN
330
330
330
400
C6
Rear Split
AS6-14-35PN
All details should be treated as preliminary. This document is proprietary and confidential
• Wiring Harnesses – MCU Loom
C4
MCU-510
726-6963 Ampseal
380
Resolver and motor HVIL should both run
inside an additional heatshrink sleeve as
they run to the same location.
Sleeve should stop 50mm before
Resolver (and 250mm before Motor
HVIL)
C14
MCU Split
AS6-10-35PN
300
980
C35
Resolver
8 Pin DTM
790 (from C4)
C97
Motor HVIL
ASL6-06-05SE-HE
990 (from C4)
C99
DC HVIL
ASL6-06-05SE-HE
C36
Water T to Motor
ASL1-06-05SD-HE
250
C98
MCU HVIL
ASL6-06-05SE-HE
All details should be treated as preliminary. This document is proprietary and confidential
• Wiring Harnesses – Dashboard Loom
All details should be treated as preliminary. This document is proprietary and confidential
• How it goes together.
All details should be treated as preliminary. This document is proprietary and confidential
• Control Systems
• Throttle
• Driver throttle Demand via a shaping map (user defined) goes into a look up
table (6 selectable preconfigured maps) which translate to a torque
application.
• Preconfigured maps will provide different power curves to suit different
periods of the race.
All details should be treated as preliminary. This document is proprietary and confidential
• Control Systems
• Brake Regen
• Braking Demand via a shaping map (user defined) is translated to an “Engine
Braking” demand to provide retardation and energy harvesting during the
braking zones.
• Preconfigured maps will provide different regen curves to suit different driver
requirements and match the need for different amounts of energy saving
throughout the race.
All details should be treated as preliminary. This document is proprietary and confidential
• Control Systems
• Regen Paddle
• An analogue paddle exists that will provide an input (similar to a hand
throttle) to allow the driver to apply variable amounts of engine braking,
irrespective of mechanical Brake Pressure.
• This will allow drivers a more flexible approach to “Coast and Lift” when
saving energy.
• All torque demands are summed.
All details should be treated as preliminary. This document is proprietary and confidential
•Safety and Switches
All details should be treated as preliminary. This document is proprietary and confidential
•Communications
All details should be treated as preliminary. This document is proprietary and confidential
•Dyno running
• Completed 4,200 kms (equivalent to ~3 seasons)
• Completed 4,000 gearshifts
All details should be treated as preliminary. This document is proprietary and confidential
•Track running
• Testing with Low Power battery has validated majority
of on car systems.
• Next step 200kW!
All details should be treated as preliminary. This document is proprietary and confidential
•Future Developments
• System is modular which will allow any component to be upgraded
or updated as new technologies become available without
obsoleting the rest of the system.
• Chassis Harness has specifically broken out a number of spare
signals (CAN, Serial, USB, Ethernet, Analogues, Digitals) to provide
for future expansion and to minimise costs of additional
requirements (Power Indicators, additional sensors, driver
biometrics, TPMS).
Questions?
All details should be treated as preliminary. This document is proprietary and confidential