Automotive Engineering - March 2021 - 10

TECHNOLOGY
REPORT
PROPULSION

Electrified Corvettes in development

SAE INTERNATIONAL
BOARD OF DIRECTORS
Jeff Hemphill
President
Todd Zarfos
2020 President
Srinivasa (Sri) Srinath, PhD
2022 President Elect
Susan Ying, PhD
Vice President - Aerospace
Ken Washington, PhD
Vice President - Automotive
Michael Weinert
Vice President -
Commercial Vehicle
Andrew Jeffers
Treasurer

With more than 20,000 units of the eighthgeneration Chevrolet Corvette sold since it
arrived in showrooms last year, expanding this
sports car family is next on the C8 program's agenda. In keeping with GM's goal
to launch 20 electric cars and trucks by 2025,
engineers currently are busy electrifying the
new Corvette. 
 A Corvette hybrid will arrive for the 2023
model year wearing the 'E-Ray' trademark GM
registered six years ago, according to industry
sources who are not permitted to discuss the
program publicly. To provide running room for
this upstart, the Corvette's iconic Grand
Sport trim has been given a leave of absence.  
 Analysts who scrutinized the C8
Corvette's mixed-materials chassis at birth saw
this hybrid move coming. Its aluminum structural backbone is a 6.5 x 12.6 x 41.0-in (165 x
320 x 1048-mm) box that yields an internal
volume of 2 cubic feet; on the current Stingray
it houses only coolant lines. Squint your eyes
and imagine GM's Ultium pouch-style lithium battery cells packaged inside this chamber.
Front spring, damper and steering components
were located from the start of the program to
give halfshafts from a pair of electric motors a
straight shot to C8's front wheel hubs. 
 Two independently controlled 50-plus hp
(37-plus kW) AC electric motors butted together
10 March 2021

will raise the Corvette hybrid's total output to
more than 600 hp (448 kW). The mid-mounted
LT2 6.2-L V8 and its 8-speed Tremec dual-clutch
transaxle will continue in the E-Ray's hybrid system with minimal changes. 
 Significant performance gains will come
from the improved power-to-weight ratio, the
enhanced traction provided by all-wheel drive
and torque vectoring on demand at the front
wheels. In addition, electrification is expected
to improve fuel economy by giving the engine
a break during cruising. Propelled solely by its
electric motors, the hybrid Corvette will be eligible for access to city centers where combustion engines alone are forbidden. 
 Downsides include a modest weight gain
and some loss of front-trunk ( " frunk " ) cargo space. Assuming GM will configure the
E-Ray as a plug-in hybrid, owners will have to
scout out charging opportunities at home and
on the road. With an expected base price
well less than $100,000, E-Ray should take the
fight capably to the Acura NSX, BMW i8 (replacement) and Tesla Roadster sportscars. 
 Proving this is no electric flash in the pan, GM
has two additional Corvette strides in the making.
For the 2025 model year, the Zora edition - honoring Corvette patron saint Zora Arkus-Duntov
- will combine the highest-caliber weapons
in Corvette Engineering's arsenal to muster more

Gregory L. Bradley, Esq.
Secretary
Pascal Joly
Jeff Varick
Rhonda Walthall
Joan Wills
SAE International Sections

SAE International Sections are local
units comprised of 100 or more SAE
International Members in a defined
technical or geographic area. The purpose
of local Sections is to meet the technical,
developmental, and personal needs of the
SAE Members in a given area. For more
information, please visit sae.org/sections
or contact SAE Member Relations Specialist
Abby Hartman at abby.hartman@sae.org.

SAE International
Collegiate Chapters

Collegiate Chapters are a way for SAE
International Student Members to get
together on their campus and develop
skills in a student-run and -elected
environment. Student Members are vital
to the continued success and future of
SAE. While your course work teaches
you the engineering knowledge you
need, participation in your SAE Collegiate
Chapter can develop or enhance other
important skills, including leadership,
time management, project management,
communications, organization, planning,
delegation, budgeting, and finance. For
more information, please visit students.
sae.org/chapters/collegiate/ or contact
SAE Member Relations Specialist Abby
Hartman at abby.hartman@sae.org.

AUTOMOTIVE ENGINEERING

CHEVROLET

The C8's advanced-design, mixed-materials chassis structure had electrified propulsion systems baked into it
from the program's inception.

David L. Schutt, PhD
Chief Executive Officer


https://www.sae.org/participate/membership/sections https://www.sae.org/participate/membership/collegiate-chapters

Automotive Engineering - March 2021

Table of Contents for the Digital Edition of Automotive Engineering - March 2021

Automotive Engineering - March 2021 - SPONSOR1
Automotive Engineering - March 2021 - CVR1
Automotive Engineering - March 2021 - CVR2
Automotive Engineering - March 2021 - 1
Automotive Engineering - March 2021 - 2
Automotive Engineering - March 2021 - 3
Automotive Engineering - March 2021 - 4
Automotive Engineering - March 2021 - 5
Automotive Engineering - March 2021 - 6
Automotive Engineering - March 2021 - 7
Automotive Engineering - March 2021 - 8
Automotive Engineering - March 2021 - 9
Automotive Engineering - March 2021 - 10
Automotive Engineering - March 2021 - 11
Automotive Engineering - March 2021 - 12
Automotive Engineering - March 2021 - 13
Automotive Engineering - March 2021 - 14
Automotive Engineering - March 2021 - 15
Automotive Engineering - March 2021 - 16
Automotive Engineering - March 2021 - 17
Automotive Engineering - March 2021 - 18
Automotive Engineering - March 2021 - 19
Automotive Engineering - March 2021 - 20
Automotive Engineering - March 2021 - 21
Automotive Engineering - March 2021 - 22
Automotive Engineering - March 2021 - 23
Automotive Engineering - March 2021 - 24
Automotive Engineering - March 2021 - 25
Automotive Engineering - March 2021 - 26
Automotive Engineering - March 2021 - 27
Automotive Engineering - March 2021 - 28
Automotive Engineering - March 2021 - 29
Automotive Engineering - March 2021 - 30
Automotive Engineering - March 2021 - 31
Automotive Engineering - March 2021 - 32
Automotive Engineering - March 2021 - 33
Automotive Engineering - March 2021 - 34
Automotive Engineering - March 2021 - 35
Automotive Engineering - March 2021 - 36
Automotive Engineering - March 2021 - CVR3
Automotive Engineering - March 2021 - CVR4
https://www.nxtbook.com/smg/sae/24AE06
https://www.nxtbook.com/smg/sae/24AE05
https://www.nxtbook.com/smg/sae/24AE04
https://www.nxtbook.com/smg/sae/24AE03
https://www.nxtbook.com/smg/sae/24AE02
https://www.nxtbook.com/smg/sae/23AE12
https://www.nxtbook.com/smg/sae/23AAVE11
https://www.nxtbook.com/smg/sae/23AE10
https://www.nxtbook.com/smg/sae/23AE09
https://www.nxtbook.com/smg/sae/23AE08
https://www.nxtbook.com/smg/sae/23AAVE07
https://www.nxtbook.com/smg/sae/23AE06
https://www.nxtbook.com/smg/sae/23AE05
https://www.nxtbook.com/smg/sae/23AAVE04
https://www.nxtbook.com/smg/sae/23AE04
https://www.nxtbook.com/smg/sae/23AE03
https://www.nxtbook.com/smg/sae/23AE02
https://www.nxtbook.com/smg/sae/23AAVE01
https://www.nxtbook.com/smg/sae/22AE12
https://www.nxtbook.com/smg/sae/22AVE11
https://www.nxtbook.com/smg/sae/22AE10
https://www.nxtbook.com/smg/sae/22AE09
https://www.nxtbook.com/smg/sae/22AE08
https://www.nxtbook.com/smg/sae/22AVE07
https://www.nxtbook.com/smg/sae/22AE06
https://www.nxtbook.com/smg/sae/22AE05
https://www.nxtbook.com/smg/sae/22AVE04
https://www.nxtbook.com/smg/sae/22AE04
https://www.nxtbook.com/smg/sae/22AE03
https://www.nxtbook.com/smg/sae/22AE02
https://www.nxtbook.com/smg/sae/22AVE01
https://www.nxtbook.com/smg/sae/21AE12
https://www.nxtbook.com/smg/sae/21AVE11
https://www.nxtbook.com/smg/sae/21AE10
https://www.nxtbook.com/smg/sae/21AVE09
https://www.nxtbook.com/smg/sae/21AE09
https://www.nxtbook.com/smg/sae/21AE08
https://www.nxtbook.com/smg/sae/21AVE07
https://www.nxtbook.com/smg/sae/21AE06
https://www.nxtbook.com/smg/sae/21AE05
https://www.nxtbook.com/smg/sae/21AVE05
https://www.nxtbook.com/smg/sae/21AE04
https://www.nxtbook.com/smg/sae/21AE03
https://www.nxtbook.com/smg/sae/21AVE03
https://www.nxtbook.com/smg/sae/21AE02
https://www.nxtbookmedia.com