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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 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
C7
Dash Split
AS6-12-35SAC9
Column
AS1-10-35SN
C22
Speed FR
ASL1-06-05SN-HE
C21
Speed FL
ASL1-06-05SN-HE
C25
Throttle
AS1-10-35SN
C28
Brake P F
ASL1-06-05SN-HE
C29
Brake P R
ASL1-06-05SB-HE
C30
Steering
ASL1-06-05SC-HE
C31
Damper FL
ASL1-06-05SE-HE
C32
Damper FR
ASL1-06-05SE-HE
C51
Brake T FL
ASL1-06-05SB-HE
C52
Brake T FR
ASL1-06-05SB-HE
C10
Lap Trigger
FGS0F303YLM
C55
Safety Lights
ASU6-03-05SA
C56
Neutral Switch
ASU6-03-03SA
C101
Spares
AS1-16-35SN
C12
IP Dongle
ASL1-06-05SD-HE
C11
Radio
ASL1-06-05SN-HE
C13
Fire Unit
ASL6-06-05PN-HE
C8
ADR
AS6-10-35SN
C16
Master Power
AS6-14-97PA
C17
Fused Power
AS6-12-35PB
C5
FIA Logger
AS6-16-35SA
C126
RESS Water Power
4 socket DTP
C38
Water Pressure
ASL1-06-05SB-HE
C47
Energised LED
ASU6-03-03SN
C48
ESS LH
13440AD2G25X1156C49
ESS RH
13440AD2G25X1156
Bottom Left
Top Right
C14
MCU Split
AS1-10-35SN
C45
Battery LV1
AS6-12-35SN
C46
FIA Sensor LV2
AS6-12-35SB
C1
ECU Engine
AS6-16-35SN
C2
ECU Chassis
AS6-18-35SN
C3
ECU Auxillary
AS6-16-35SA
Bottom
Right
C6
Rear Split
AS1-14-35SN
310
310
250
310
540
540
660
2000
LV1 and LV2 Main
Keyway direction (red
arrow) in direction of boot
Refer to photo for keyway position
240
180
400
400
510
510
400
400
280
510
1430
100
200
150
530
220
690900
900
530
630 630
400 450 550
1100
620
620
620
860
250
ADR boot to be in
direction of master
keyway (as per red
arrow)
Right angle boots for
both Water pump
connectors. Exiting in
direction of release tab.
Right angle boot for
Water pump connector.
Exiting opposite
direction of release tab.
C26
Water Pump Power
4 socket DTP
C27
Water Pump CAN
6 socket DTM
C128
RESS Water In
2 Pin Jetronic
1928402078
C129
RESS Water Out
2 Pin Jetronic
1928402078
1000
1000
1200
C130
Transponder
ASL1-06-05SD-HE
400
C4
FIA Logger
AS6-16-35SN
All details should be treated as preliminary. This document is proprietary and confidential
Wiring Harnesses Gearbox Loom
C24
Speed RR
ASL1-06-05SN-HE
C23
Speed RL
ASL1-06-05SN-HE
C33
Damper RL
ASL1-06-05SE-HE
C34
Damper RR
ASL1-06-05SE-HE
C53
Brake T RL
ASL1-06-05SB-HE
C54
Brake T RR
ASL1-06-05SB-HE
C6
Rear Split
AS6-14-35PN
C25
Speed Layshaft
ASL1-06-05SA-HE
C26
Speed Mainshaft
ASL1-06-05SB-HE
C11
Gbox Oil Temp
ASL1-06-05SD-HE
C15
Gbox Barrel pos
ASL1-06-05SC-HE
C16
Gbox Air Pressure
ASL1-06-05SN-HE
C27
Shift Up
ASU1-03-03SN
C28
Shift Down
ASU1-03-03SA
C29
Pressure Release
ASU1-03-03SB
C30
Rainlight
AMP 963040-3
330
330
330
330
400
330
330
330
220
220
220
220
620
310
310
340
All details should be treated as preliminary. This document is proprietary and confidential
Wiring Harnesses MCU Loom
C4
MCU-510
726-6963 Ampseal
C35
Resolver
8 Pin DTM
C97
Motor HVIL
ASL6-06-05SE-HE
C98
MCU HVIL
ASL6-06-05SE-HE
C99
DC HVIL
ASL6-06-05SE-HE
C14
MCU Split
AS6-10-35PN
790 (from C4)
380
990 (from C4)
250
980
C36
Water T to Motor
ASL1-06-05SD-HE
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)
300
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
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