F R A U N H O F E R I N S T I T U T E F O R T R A N S P O R TAT I O N
A N D I N F R A S T R U C T U R E S Y S T E M S I V I
MOVING THE FUTURE –INNOVATIVE POWER TRAIN SYSTEMS
H O W T O G E T T O T H E I N S T I T U T E
Use the link www.ivi.fraunhofer.de to find a detailed
description of how to get there.
For further information feel free to contact us.
Public Relations
Elke Sähn
Phone +49 351 4640-612 | [email protected]
Fraunhofer Institute
for Transportation and Infrastructure Systems IVI
Director: Prof. Dr. Matthias Klingner
Zeunerstraße 38 | 01069 Dresden
Phone +49 351 4640-800 | www.ivi.fraunhofer.de
Gesam�ahrzeug
vehicleengine
gear box
VOITH DIWA
ZF
others
differen�al
pressure tank
compressor
cooling circuit
fan pump
cooling circuit
generator
ba�ery
door driveinterior
braking system
electrical consumer
air condi�oner
fuel pump
starter
servo steering
wheel
wheel
wheel
auxiliary heater
ME M M M M M M M M M
M
P
E
M
E
M
E
M
E
M
P
P
ME
E
E
PPT
T
TT
T T
P M
M
M
M
E
E
E M
E
M
M
T
T
fan pump
M
E
M
M
E
E
fan pump
M
E
M
E
E
M
100 200 300 400 500 600 700 800 900 10000
5
10
15
20
25
time
velocity
I D E A
S I M U L A T I O N M O D E L
The Fraunhofer Institute for Transportation and Infrastructure
Systems IVI operates a test field, at which diesel engines,
electrochemical and electrostatic accumulators (batteries, super
caps) can be tested. The test stands can be operated separately
or together allowing investigations of hybrid power trains of
commercial vehicles.
Engine test stand
Load machine with 300 kW continuous power
(four quadrant operation)
Continuous torque 2000 Nm
Max. engine-speed gradient 10 000 rpm/s
Fuel conditioning and measuring equipment
Measuring equipment for torque, speed, pressure and
temperature
Separate data logging for 64 channels with a sampling
rate of 100 kHz
Test stand automation
Accumulator test stand
Air-conditioned test bed (20 – 60 °C)
Variable electronic load of up to 250 kW
(two quadrant IGBT-converter)
Current 0 – 400 A
Voltage 30 – 800 V
CAN Interfac
The Fraunhofer IVI developes concepts for the on-board power
supply and the energy transfer from roadside charging stations to
vehicles. The concepts are implemented into vehicle prototypes and
tested.
The minimization of their mass and dimensions as well as the
reduction of emissions and energy consumption are essential for
the development of power supply systems. To achieve these
objectives, the Fraunhofer IVI carries out:
studies on compact power trains consisting of an engine, a
generator and power electronics as well as on all-electric power
trains for public transport vehicles and
the development of operation strategies for maximum energy
efficiency taking vehicle-specific operation conditions into
account.
The Fraunhofer IVI expertise on roadside energy supply comprises:
discontinuous energy supply for all-electric puplic transport
vehicles using charging stations,
conception, construction and testing of systems for
high current energy transfer from local charging stations to
buses and trams and
reduction of grid loads by using electrical energy storages in
local charging stations (»docking principle«).
Conventional commercial vehicle concepts offer a lot of possibilities
to optimize fuel consumption. The focus of current developments is
on minimizing the energy consumption of the power train.
The power demand of the auxiliaries also influences the fuel
consumption significantly, but has not yet been widely considered.
The institute disposes of a physical complete vehicle simulation
model for the analysis of the energy consumption of various
auxiliaries, which includes power train components e. g. the
pressure system,
on-board supply system,
steering servo system,
cooling system and
air conditioning system.
The modular concept of the model allows the design, test and
analysis of different technical measures. Furthermore, operation
strategies for the power train and the auxiliaries can be developed
and tested. The simulation model can also used for power train
dimensioning and controller testing.
At the Fraunhofer IVI longitudinal dynamics simulations can be
carried out using a simulation model, which makes it possible to
configure power trains and improve power management strategies.
The modular model structure, consisting of
vehicle modules of up to 3 segments and five axles or bogies,
map-based internal combustion engine modules,
map-based electric engine and gearbox modules,
characteristic curve based power electronics,
on-board supply system and traction-energy storage modules,
tyre-slip and rail-wheel-contact modules,
control strategies as well as,
time- and distance-based velocity and height profiles
enables the composition of a wide variety of conventional, hybrid
and electric vehicles. More than 100 different power train
configurations can be simulated and analysed. The selection of
the power train configuration and operating strategy as well as
the parameterization of the components and the driving cycle is
supported by a visual user interface and a components database.
Time-consuming serial simulations of single parameters and
complete data sets can be carried out automatically. For the study
of the results, comfortable analysis and visualization tools are
implemented.
P H Y S I C A L C O M P L E T E V E H I C L E M O D E LP O W E R T R A I N T E S T F I E L D E N E R G Y S U P P LY F O R V E H I C L E S