Transmission for Front Wheel
Drive Hybrid Powertrains HT1
HT1 Features
" Delivers top in class fuel saving (> 25%)
" Performance and driveability equal or better than conventional.
Agility superior to conventional.
" Low hybrid cost premium by making use of large volume VT2 and
VT3 components
" Straightforward vehicle integration
" Integrated solution from one partner
" One configuration for HEV, PHEV and EV+RE
" Punch provided engines available
29/03/2011
HT1 2
HT1 Comfort
" Combine fluent shift behaviour with electric motor agility
" Total flexibility in control strategies offering customer specific driveability
" State-of-the-art software functions available e.g. :
 Robust hybrid powertrain control
 Adaptive functions for compensation of lifetime effects
 Diagnostics like OBDII
 Driving strategy features like:
" warm-up mode after cold start
" uphill / downhill recognition
" sport mode / economy mode / EV-mode / brake mode
29/03/2011
HT1 3
HT1 Fuel Saving Potential
Powertrain
VT2 VT2+ HEV PHEV EV+RE
20
Reference is conventional with manual transmission
0
Hybridisation
only
-20 Idle stop
applied
-40
-60
Additional measures
-80
on engine and vehicle
-100
29/03/2011
HT1 4
Change in Fuel Consumption [%]
HT1 Powertrain architecture
POWERTRAIN MANAGEMENT
HCU BCU
CAN
ECU TCU BMS
MCU
ICE
EMG
+
AuxDr AirCo
AuxDr AirCo
PowEl
CVT Bat
29/03/2011
HT1 5
HT1 Data Sheet
Transmission type Transmission data
Hybrid transmission for passenger cars Similar to VT2 except:
Continuously variable front transversal  Oil pump is electrically driven
 Constant gear ratio between 4.89 and 5.76
Engine Electric Drive
Standard engine: 4A91 Switched Reluctance motor
 1.5l DOHC 16v, MIVEC  Peak torque 200 Nm
 83 kW @ 6000 rpm  Peak power 30 kW (HEV) or 50 kW (PHEV)
 147 Nm @ 4000 rpm  Water cooled
OEM s own engines possible, Water cooled power electronics
3A9x and 4A9x engines require no hardware change
Control units Shift lever positions:
HCU: powertrain control P R N D
TCU: transmission control S or L optional
MCU: motor control
Driving modes Driving modes
Low (minimum, theoretical) ratio: 0.443 Economy mode
OD (maximum theorerical) ratio: 2.416 Power mode
Ratio coverage: 5.45 EV mode
Center distance: 155 mm
Auxiliary drive (high voltage) Powertrain mass
Airconditioning drive Including engine 204 kg
Engine starter Excluding engine 122 kg
Backup generator
29/03/2011
HT1 6
HT1 Powertrain Dimensions
Overall dimensions with 4A9 engine:
" Total length 814 mm
" Total height 625 mm
Dimensions HT1
" Total length 351.5 mm *
* Measured from RFOB, engine design will influence this value
255
171.4
463 351 319 293
29/03/2011
HT1 7
424
201
74.7