48v: how much hybridization is possible with the new ... · pdf file48v: how much...
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48V: How much hybridization is possible with the new vehicle power? 14th International VDI Congress, Friedrichshafen Uli Christian Blessing – Chief Engineer Hybrid
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Agenda
1. Motivation
2. 7DCT300 Base Transmission
3. 7HDT300 Hybrid Transmission
4. 48 V Comparison
5. Plug-In Hybrid Solutions
6. Conclusion and Summary
2
Ready for the CO2-Challenge
June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Motivation Ready for the CO2-Challenge
June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
CO2 IMPROVEMENTS
COSTS
CUSTOMER/OEM NEEDS
FUN 2 DRIVE
FUNCTIONALITY
3
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Motivation Ready for the CO2-Challenge
June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
FUNCTIONALITY
shift-by-Wire
park-by-Wire
in-a-box solution
integrated hybridization
CO2 IMPROVEMENTS
high efficient powertrain
power on demand actuation
extended sailing functionality
pure electric driving
downsized engines COSTS
transmission kit
volume of scale
reduce rare earth materials
CUSTOMER/OEM NEEDS high efficient hybridization
hybrid as must-have option
new driving functionalities
easy scalability
easy adaptation
no serviceability
real fuel efficiency improvement
FUN 2 DRIVE
increased launch performance
boosting
immediate reaction
4
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COSTS
Motivation Ready for the CO2-Challenge
June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
FUNCTIONALITY
shift-by-Wire
park-by-Wire
in-a-box solution
integrated hybridization
CO2 IMPROVEMENTS
high efficient powertrain
power on demand actuation
extended sailing functionality
pure electric driving
downsized engines
transmission kit
reduce rare earth materials
CUSTOMER/OEM NEEDS
high efficient hybridization
hybrid as must-have option
new driving functionalities
easy scalability
easy adaptation
no serviceability
real fuel efficiency improvement
FUN 2 DRIVE
increased launch performance
boosting and immediate reaction
5
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Ready for the CO2-Challenge
Situation Today - Near Future:
Various concepts (minor to medium volumes)
Various hybrid power levels:
Mild Hybrid (48V with 15 kW) with significant volume demand
Full Hybrid (~220V with 50 kW)
Plug-In Hybrid (>360V more than 110 kW)
Very high diversity on OEM requirements
High costs (for piece price and ED+T) due to low overall volumes
Rare earth materials should be avoided if possible
Increasing CO2 targets with benefits for pure electric driving (e.g. EU / China /
US /…)
Goal: One Hybrid Transmission kit, that can cover most of the needs
Looking for the Swabian CO2-Champion
6 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Base Transmission 7DCT300
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Ready for the CO2-Challenge
Key Facts:
Input torque up to 300 Nm
7-speed + R with a gear ratio span of >8.5
Wet nested dual clutch with electrical on-demand cooling
Electro mechanical gear and electro hydraulic clutch actuation
Start/stop and extended sailing functionality
Mechanical park lock
Options:
Park-by-Wire
AWD
Hybrid
7DCT300 – Base Transmission
8 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Ready for the CO2-Challenge
Carry over of key components
TCU with electric actuation for clutch and shift
Wet clutch with electrical on-demand cooling
Modular Software Architecture
7DCT300 – Transmission Kit for various solutions
9 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
6DCT150 6-Speed PowerShift
7HDT300 7-Speed Hybrid
7DCT300 7-Speed PowerShift
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Hybrid Transmission 7HDT300
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Ready for the CO2-Challenge
Key Facts:
7HDT300 based on 7DCT300
GETRAG torque split concept
Carry-over of key components from DCT transmission kit
High-speed e-machine
One common oil circuit for cooling and lubrication
Electrical park lock system (w/o add. actuator)
Integrated e-machine with different power levels
mild hybrid (48 V, 21 kW)
plug-in hybrid (up to > 360 V; >110 kW)
7HDT300 – Hybrid Transmission
11 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Ready for the CO2-Challenge
Additional Components for Hybrid
E-machine (as tested-unit)
Intermediate gear set
Connectors for EM
Bidirectional cooling flow pump (using same
electric cooling pump as clutch cooling)
Assembly of e-machine and inverter at GETRAG
7HDT300 – Hybrid Transmission
12 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Ready for the CO2-Challenge
Hybrid Modes:
Pure electric driving
Extended sailing
Recuperation
Boosting
Generator-mode / load-shift
Charge@standstill
Restart of internal combustion engine with Torquesplit effect
Remark: Hybrid modes identical for 48V and Plug-In version
7HDT300 – Hybrid Transmission
13 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Ready for the CO2-Challenge
Overall Optimization:
More compact package
Less material and amount of parts
7HDT300 – Consequent Evolution
14 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
2013 2014
Higher overall efficiency
Same power and torque levels
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Ready for the CO2-Challenge
7HDT300 – Latest Design for 48V (Integrated Solution)
15 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
differential c/o DCT
TCU c/o DCT
Transmission mount
Inverter
cooling water
Inverter
48V Bat. Connection
Inverter
CAN & 12V
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48V Comparison
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17
Ready for the CO2-Challenge
June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
Key Facts: Air-cooled claw pole EM
Belt-connection to ICE
Integrated inverter
Key Facts:
Oil-cooled EM
Integrated in gearbox
Stand-alone inverter
Key Facts:
Water-cooled EM
Flanged to transmission
Stand-alone inverter
48V Comparison: Belt vs. Flanged vs. Integrated Solution
Belt Solution Integrated Solution Flanged Solution
Remark: For simplicity reasons, only these three main-stream examples
have been chosen
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Ready for the CO2-Challenge
48V Comparison: Belt vs. Flanged vs. Integrated Solution
18 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
EM-Performance
Max. torque
Max. power
Cont. power
Efficiency
Fuel Efficiency
NEDC
WLTP
Belt Solution Integrated Solution Flanged Solution
up to 50 Nm
up to 21 kW
up to 13 kW *
up to 95 %
10 – 12 %
7 – 9 %
19 – 22 %
14 – 16 %
up to 50 Nm
12 – 14 kW
2,5 – 3,5 kW
up to 85 %
up to 50 Nm
up to 18 kW
up to 8 kW *
up to 94 %
17 – 20 %
12 – 14 %
* depending on battery performance
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Ready for the CO2-Challenge
19 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
Hybrid Modes
El. creep/drive
Boosting
Generator
Driveabiltiy
Others
Package
Efficiency
Belt Solution Integrated Solution Flanged Solution
48V Comparison: Belt vs. Flanged vs. Integrated Solution
not possible
limited
possible
medium
possible *
possible
diff. gears
high
* depending on battery performance
possible *
possible
diff. gears)
high
“easy”
belt-drive
challenging
Efficiency
possible
very high
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Ready for the CO2-Challenge
20 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
Integrated Solution offers much better el. driving performance
100
50
0 0 2.000 4000 6000
T in Nm
n in rpm
Drag torque range of
typical combustion
engines
Belt Solution 100
50
0 0 2.000 4000 6000
T in Nm
n in rpm
Integrated Solution
Continuous Power of Belt vs. Integrated Solution
Remark: The Flanged Solution is close to the Integrated Solution
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Easy Scalability:
From 48V Mild Hybrid to 360V Plug-In Hybrid
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Ready for the CO2-Challenge
22 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
48V System 360V Plug-In System
Hybrid Transmission Kit: From 48V up to 360V Plug-In Hybrid
Changed stator windings and power connectors ensure easy scalability
EM-Performance
Max. torque
Max. power
Cont. power
Efficiency
Max. speed
Max. phase current
- up to 50 Nm
- up to 21 kW
- up to 13 kW *
- up to 95 %
- 18.000 rpm
- 350 A
- up to 150 Nm
- more than 110 kW
- up to 35 kW *
- up to 96 %
- 18.000 rpm
- 450 A
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Ready for the CO2-Challenge
23 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
Hybrid Modes
El. creeping/driving
Boosting/Generator
Costs
Fuel Efficiency
NEDC
WLTP
48V System 360V Plug-In System
Hybrid Transmission Kit: From 48V up to 360V Plug-In Hybrid
limited (~20-30 km/h)
possible (diff. gears)
medium
possible (>130 km/h)
possible diff. gears
high
19 – 22 %
14 – 16 %
26 – 80 %
19 – 68 %
Changed stator windings and power connectors ensure easy scalability
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Conclusion & Summary
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Ready for the CO2-Challenge
Conclusion:
Belt Solution:
Offers a higher efficiency than a 12V system
Requests a standard 48V system
The overall driveabiliy is only little improved
Flanged and Integrated Solution:
Only in combination with a high-energy 48V system
Pure el. driving is possible with real value-add for end-customers
Summary:
Integrated 48V system offers best ratio cost vs. CO2 improvements
Hybrid transmission kit can easily be scaled from 48V mass market up to
Plug-In Hybrid needs
48V: How much hybridization is possible, with this
new vehicle power?
25 June 25, 2014 © GETRAG, 14th International VDI Congress, Drivetrain for Vehicles, Friedrichshafen June 2014, Uli Blessing
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Thank you for your attention
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