Momentum - April 2020 - 15



Image credit: General Motors

GM said a new-generation electrical architecture will enable the high-tech features and capabilities crucial for advanced electric vehicles and driverassistance features.
media a deeper look at the company's
all-new vehicle electrical architecture
that was first confirmed in mid-2019,
saying the vehicle-wide electrical system
is associated with more than 100 new
patents. The advanced "digital vehicle
platform," known internally as Global
B, debuted with the 2020 Cadillac
CT5 sedan. It serves as the electrical
foundation for the 2020 Chevrolet
Corvette Stingray and the 2021 Chevrolet
Tahoe and Suburban, GM Yukon, and
Cadillac Escalade.
Gary Bandurski, Executive Director
of Global Electronic Components and
Subsystems, said the new electrical
architecture has approximately five times
the processing capacity of GM's current
systems-enough to move 4.5 terabytes
per hour, the equivalent data of 980
digitized movies or nearly a mile-and-half
of books on a shelf. In addition to multiples
of speed and functionality, the advanced
electrical system also greatly bolsters
cybersecurity strength, Bandurski added. 
But more noticeably for vehicle owners,
he said, the advanced architecture will
provide for a wide spectrum of over-theMOMENTUM

2004_TE_15.indd 15

air (OTA) software-update functionality
and enhanced driver-assistance and
safety capabilities. Apparent dynamic
aspects will include faster brake response
and smoother and more accurate
accelerations and decelerations while
using adaptive cruise control and the
increasingly sophisticated versions of
GM's Super Cruise SAE Level 2 driverassistance system, while all onboard
cameras now display high-resolution
images (to now, a mix of analog and
digital has been employed), all with at
least 1-megapixel resolution.
"Our new digital vehicle platform and
its eventual successors will underpin
all our future innovations across a wide
range of technological advancements,
including EVs and expanded automated
driving," summarized GM President Mark
Reuss in the company's initial release
announcing the new electrical system.
Bandurski said the new electrical
platform reduces the amount of
wires and other hardware and brings
corresponding packaging advantages,
although the company has yet to
specify how much material or weight
can be saved. The system also provides

greater bill-of-material sharing between
internal-combustion-powered vehicles
and its coming generation of fully
electric vehicles.
The company said the new system lends
itself to more intensive validation methods
that come with increased digitization of
all systems. Knowledge from past system
designs was used to internally validate
with a mixture of laboratory and road work
that includes a 100,000-sq.ft. validation
lab and a high degree of automation in the
testing process.
A full-system test bench, an active
safety bench, and a harness verification
frame are used in the validation lab to
assure comprehensive and safe testing.
Meanwhile, a specially outfitted lab tests
up to 90% of current combinations of the
new system's infotainment functions; one
part of the lab features a robotic testing
rig that runs 24 hours a day to mimic user
actions to identify potential functionality
or compatibility issues. The lab also
includes a station dedicated to validating
Bluetooth and wi-fi connectivity for a
spectrum of current mobile phones and
upcoming models.
By Bill Visnic, editorial director, SAE Mobility Media

April 2020 15

3/19/20 11:26 AM


Momentum - April 2020

Table of Contents for the Digital Edition of Momentum - April 2020

Momentum - April 2020
Start a new SAE Chapter in your life
Focused on design
Taking the classroom to the racetrack
Great moments happen due to the work of many
ONE-ON-ONE – Emily Kerr
Sticking to the schedule
GM deploying electricals of the future in new architecture
Myers Awards winners named
SAE 101: Industry Leadership Award
Dossier: Justin Lange of John Deere
Focusing on the ‘E’ in STEM
Momentum - April 2020 - Momentum - April 2020
Momentum - April 2020 - Cover2
Momentum - April 2020 - 1
Momentum - April 2020 - Start a new SAE Chapter in your life
Momentum - April 2020 - BENEFITS U
Momentum - April 2020 - Focused on design
Momentum - April 2020 - 5
Momentum - April 2020 - 6
Momentum - April 2020 - Taking the classroom to the racetrack
Momentum - April 2020 - 8
Momentum - April 2020 - Great moments happen due to the work of many
Momentum - April 2020 - ONE-ON-ONE – Emily Kerr
Momentum - April 2020 - 11
Momentum - April 2020 - Sticking to the schedule
Momentum - April 2020 - 13
Momentum - April 2020 - BRIEFS
Momentum - April 2020 - GM deploying electricals of the future in new architecture
Momentum - April 2020 - Myers Awards winners named
Momentum - April 2020 - SAE 101: Industry Leadership Award
Momentum - April 2020 - Dossier: Justin Lange of John Deere
Momentum - April 2020 - 19
Momentum - April 2020 - Focusing on the ‘E’ in STEM
Momentum - April 2020 - Cover3
Momentum - April 2020 - Cover4