SAE Update - May 2024 - 24

TECH FOCUS:
TESTiNg AND DigiTAl TwiN
Overcoming EV drivetrain
testing challenges
is common practice among
previous-generation testing
systems. This method provides
much greater power efficiency
and measurably reduces overall
operating costs.
Coupled with DynoLab, the
Solid-State Battery Simulator/
Tester accurately simulates the
response of the high-voltage
battery in real-world conditions.
However, since it is not subject to
a variable charge state, it
provides repeatable results. This
same unit, when operated as a
battery tester, subjects the
battery to the same charge/
discharge profile as it would
encounter in an actual vehicle on
an actual road course.
One of the advantages of
using the AC dynamometer with
a regenerative DC power source
is that when the two are
coupled together, the power
absorbed by one unit can be recirculated
back to the other unit
within the test system. This
greatly reduces the power
drawn from the AC mains-by as
much as 85 to 90%-and
therefore significantly reduces
total cost of operation. Low
maintenance requirements also
contribute to lowering operating
costs.
24
May 2024
Hybrid or electric driveline testing is conducted at several stages during the
development of a vehicle
Communication with control modules
Communication with individual MCUs is another
feature that must be built into testing systems for
hybrid or electric vehicles. In the past, the engine was
primarily controlled using the throttle and ignition.
Now, engines have an engine control unit (ECU), the
vehicle will likely have a separate MCU that controls
the electric drive and may have separate units for
controlling the transmission and/or charging systems.
These units typically communicate commands and/
or data between themselves via high-speed vehicle
networks, such as CAN, LIN, FlexRay, etc. To properly
test this complex drivetrain configuration, the test
system must be able to communicate with these
control units simultaneously and efficiently.
There is great excitement in the automotive, heavy
equipment, military, and aerospace industries over the
promise of improved environmental performance of
hybrid and electric vehicles. To achieve that promise,
driveline testing programs must be adopted that meet
the needs of these technologies. n
UPDATE
Hexagon

SAE Update - May 2024

Table of Contents for the Digital Edition of SAE Update - May 2024

SAE Update - May 2024 - Cov1
SAE Update - May 2024 - Cov2
SAE Update - May 2024 - 1
SAE Update - May 2024 - 2
SAE Update - May 2024 - 3
SAE Update - May 2024 - 4
SAE Update - May 2024 - 5
SAE Update - May 2024 - 6
SAE Update - May 2024 - 7
SAE Update - May 2024 - 8
SAE Update - May 2024 - 9
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SAE Update - May 2024 - 11
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