Dynascan Documentation

DYNASCAN
Software and electronic solutions
for inertial or braked dynamometers
Systems for chassis and engine
dynamometers
Solutions for braked or inertial
dynamometers
Compatible with all technologies;
automobile, motorcycle, kart…
DYNASCAN_UKP_11_05
Multi-track technology; single
or multi rollers compatibility
Economic solution for
renovation of existing test beds
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15 YEARS OF DYNAMOMETER EXPERIENCE
Rotronics has over fifteen years of experience
in the design, development and manufacture of
dynamometers.
This experience, which includes associated
measurement techniques has enabled Rotronics
to develop a data acquisition and operating system
compatible with all types of inertial or braked test
beds : the DYNASCAN solution.
A single concept, with multiple applications
Dynascan is a universal inertial dynamometer
operating system including operating software
and a high performance digital data acquisition
system.
This product, compatible with all existing
test facilities, is assigned for users of earlier
generation test beds as well as for all those who
wish to build their own test bed mechanics.
Available in an engine test bed or chassis test
bed version, inertial or braked dyno, Dynascan
is an economic and modern solution that
answers the needs of the most demanding
engine specialist.
Totally adjustable in accordance with the test
bed’s characteristics, Dynascan is suitable for
multiple applications : automobile, motorcycle,
kart, Shell marathon, modelling....
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Fast and easy installation
- For inertial test beds, the only mechanical work
consists of installing the rotation speed sensor
on the shaft of the flywheel, or of the inertial
roller(s).
Once installed, the data acquistion card is able to
determine the speed and acceleration of rotating
elements and transmit this information to the
software.
- For braked test beds, it is necessary to install
and cable the load sensor on the brake, and the
power supply of the Eddy current brake.
During the initial software run, a configuration
procedure invites the user to enter all mechanical
characteristics of the test bed (inertia, diameters and number of rotating elements), eventually
calibrating the brake torque measurement.
Following this operation, which takes only few minutes, the information entered is automatically
reloaded each time the software is used.
User-friendly high performance software
Developed to run in a WndowsTM environment (NT, 2000 or XP), the DYNASCAN software has been
the subject of a thorough ergonomic study in order to get a user-friendly operating system.
It has a powerful and intuitive
user interface, and is very
easy to use for all software
operations.
Acquired data is
instantaneously processed
and each measurement is
displayed in real time. The
user has continual access to
all information necessary for
optimum testing.
The saved data is displayed in
graphical or table format and
can hence be compared with
previous tests or exported to
other software applications.
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Dynascan Engine
Solution for inertial or braked engine dynamometers
Dynascan Inertia Engine is
adapted to all types of inertial engine
dynamometers.
Measurements are made during
the acceleration phase from a
programmable minimal speed and
until a maximum speed.
Dynascan Braked Engine, is derived
from our karting dynamometer. The
software supplied with Dynascan
Engine is compatible with all types
of braked engine test beds. Measurement can be done during acceleration under controlled load,
defined under road law completely programmable. Measurements can also be done according to
speed level. Thanks to the semi-automatic integrated procedures, the test is run directly from the
computer, with no intervention on the dyno.
The power and torque curves are available as real or corrected, (according to atmospheric
conditions).
The user can superimpose up to 16 different curves on one graph, rename it, save the output, add
commentaries, or print the results as a test report.
Dynascan Chassis
Solution for inertial or braked chassis dynamometers
While similar to the engine version, Dynascan Chassis
comprises equipment and complimentary test procedures that
fulfill the specific requirements of a dynamometer having one
or more rollers.
Operation of the test bed is carried out from the vehicle driving
seat using a remote control unit.
This software version also enables complimentary plots such
as the force at the wheel, acceleration or power as a function
of linear speed, etc...
Finally, simulation tools taking into
account the mass, gear ratios and the
vehicle aerodynamics, allow calculation
of the real acceleration of the vehicle and
optimisation of gear ratios.
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USING THE MEASUREMENTS AND ANALYSING THE DATA
The many graphs and tables proposed for each series of measurements allow easy
diagnosis of faulty performance and detection of items requiring optimisation.
Here we see curves of power and torque for a
motor-cross engine installed in an inertial engine
dynamometer.
We can clearly see the improvements resulting
from the tuning engineer’s modifications to the
exhaust and air intake.
This plot shows the change in the signal
from a Lambda sensor located in the
exhaust system of a single cylinder engine,
we can see that the mixture is too lean at
high revs, which results in a power loss and
an increased risk of engine failure. All data
sets can also be presented in tabular form,
which facilitates reprogramming the engine
management electronics.
Here we can see an ignition defect in a four
cylinder engine, the curve indicates a loss of
power at 112 mph or approximately 7000 rpm.
Thanks to the engine speed kit, an ignition
anomally is identified and localised (transient
problem in cylinder 3).
Finally we see a simulation of aerodynamic
resistance on a roller test bed equipped with
Dynascan chassis.
This function allows to stage the gear box in
optimum way to harmonise the engine with its
vehicle.
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EQUIPMENT AND ACCESSORIES
Vehicle cooling unit : Available in several versions, according to the engine power
being cooled. The cooling fan assures material safety (overheating) and helps at
repeatability by giving stabilised temperatures.
Exhaust gas system : The mobile system allows recover, and evacuation of vehicle
exhaust gas.
Environment Monitor Light SML101 : Environment monitor measuring temperature,
humidity, and atmospheric pressure thanks to its 3 high precision sensors. It send
automatically the datas to the software that determines corrections to apply to
results.
The Environment Monitor SME301 : The SME 301 has the same functions as
the SML101, but also offers four type K thermocouple inputs, and four 0-10 Volt
analogue inputs for complementary sensors.
OBD vehicle interface : Allows engine data acquisition (engine speed, water
temperature, air inlet pressure, etc) from the diagnostic OBD connector of the vehicle
without mechanical intervention or complicated instrumentation.
Engine speed kit : The engine speed kit comprises of a sensor designed to measure
and transmit an engine’s ignition or injection frequency to the data acquisition card.
Thanks to this sensor, the software automatically calculates the transmission ratio
by synchronising engine speed and roller speed signals. The equipment is supplied
with different measurement devices (induction clamp, piezo-electric sensor for
diesel engines, ignition coil measurement circuit...) allowing its adaptation to most
types of cars.
Air/Fuel ratio measurement kit CMR101 : The CMR 101 kit allows wide-band
sensor (UEGO) management, a digital display of the calculated values such as
average richness, air/fuel ratio, air excess (lambda) or oxygen rate. This data is
transmitted to the software and allows the air/fuel ratio or lambda curves to be drawn
according to the engine speed.
Gas analyser : Available in four or five gas versions (CO, CO2, O2, HC, optionally
NOx), this analyser also calculates corrected CO content, Lambda and the
stoichiometric ratio. It can, moreover, input engine speed and oil temperature data
in order to adjust the fuel mixture under various regimes and engine loads.
Computer and printer : Systems are compatible with most PCs (minimum Windows
2000 or XP, 2Ghz 256 Mb Ram, 1 free serial port for DynaScan inertial, 1 ethernet
network port for DynaScan braked) but we offer computers adapted and optimised
to the specific needs of Dynascan software.
Workshop cabinet : Pratical, solid and attractive, it accomodates computer
hardware and all the test bed accesories (engine speed kit, temperature probes,
ear protector,...)
Additional sensors : A wide range of sensors is offered to complete power and
torque measurement, with other measurements useful for the engine development :
temperature of fluids, exhaust, cylinder plug, pressure of blow-by, of turbo, Lambda
sensor...
ROTRONICS
39, impasse de l’étang - Z.I. des Dragiez
74800 La Roche sur Foron - FRANCE
http://www.rotronics.com
[email protected]
Tel : +33(0)450 030 859 Fax : +33(0)450 030 597
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