Automotive Engineering - April 2021 - 15

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2022 Bolt EUV: Super Cruise ADAS comes to Chevy 

ALL IMAGES: CHEVROLET

The 2022 Bolt EUV is 6 in. longer and 90-lb. heavier than Bolt EV. The vehicles share no exterior
body panels, to give each a distinctive look.
General Motors has made the first step
toward democratizing Super Cruise, its
SAE Level 2 driver-assist system that is
designed to reduce driver workload during long trips. In summer 2021, Super
Cruise will be available on " Premier "
(top trim) versions of Chevrolet's new
2022 Bolt EUV. SAE's Automotive
Engineering recently drove a pre-production EUV equipped with Super Cruise
in busy 80-mph (129-km/h) interstate
traffic - an ideal scenario for evaluating
a vehicle's ADAS capabilities on the freeway. Impressions were mixed. 
 About this newest Bolt: Don't pronounce it eyoove. The EUV is the quasiutility version of the Bolt EV sedan, with
unique exterior styling and no shared
body panels. The " U " model SUV has a
6-in. (152-mm) longer wheelbase and 3
in. (76 mm) more rear-seat leg room
than its sister EV. But the EUV's measured cargo volume with rear seat folded  actually is a few square-millimeters
less. And its rear end tapers in between
the thick C pillars, which also will limit
the vehicle's hauling capability. 
 Bolt EUV's curb weight, 3,679-lb
(1,669-kg), is 90 lb (41 kg) heavier than
the Bolt EV mainly due to its larger
bodyshell, according to EUV program
engineering manager Rob Mantinan.
Some 947 lb (430 kg) of the EUV's
mass is the 65-kW-h, liquid-cooled,
288-cell lithium-ion battery pack that is
AUTOMOTIVE ENGINEERING

common to the two Bolts. They also
share the single permanent-magnet
traction motor rated at 266 lb-ft (360
Nm) driving the front axle. The EUV's
extra mass reduces its estimated driving range by nine miles (14.5 km) compared with the smaller, lighter Bolt's
estimated 259 miles (416 km). 
 

Super Cruisin' Chevy 

In terms of sensor hardware, " This is essentially the same Super Cruise system

used in the [2020] Cadillac CT6, " noted Mantinan, who was along on the media drive. Both Chevy and Cadillac applications are based on an array of exterior
radars and cameras, an inertial sensor and a small optical/infrared camera
on the steering column to monitor driver
attention. The high-definition 3D maps
that determine Super Cruise's operating
domain are updated monthly in collaboration with GM's mapping partner, Ushr.
They now cover more than 200,000
miles (322,000 km) of enabled U.S. and
Canadian roads, up from 130,000
miles (209,000 km) in 2019. Routes remain restricted to divided roadways. 
 The Bolt EUV's Super Cruise features
a new, second-generation driver monitoring camera that is more effectively
shielded against infrared waves of sunlight entering through the backlite and
rear side windows. In the original 2018
CT6 application, intruding low-angle
rays would intermittently disengage the
system. (See November 2017
Automotive Engineering feature: https://
www.nxtbook.com/nxtbooks/
sae/17AUTP11/index.) " We conducted a
sunlight study with a supplier, identified
the wavelengths that are least obtrusive,

Bolt EUV is GM's first application of the SAE Level 2 Super Cruise driver-assistance technology
outside of the Cadillac brand.
April 2021 15


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Automotive Engineering - April 2021

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