Truck & Off-Highway Engineering - August 2024 - 1

EDITORIAL
Ryan Gehm
Editor-in-Chief
Ryan.Gehm@sae.org
Sebastian Blanco
Senior Editor
sebastian.blanco@saemediagroup.com
Chris Clonts
Senior Editor
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Gilkes, Paul Weissler
DESIGN
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EDITORIAL
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Hybrids are having a moment
Manufacturers at the forefront of sustainability
efforts and intent on electrifying
commercial trucks and off-highway machines
still see the necessity to include
internal combustion engines in their future
product plans. Take Volvo, for example. At
the 2024 ACT Expo in Las Vegas, the
company reaffirmed its goal of reaching
net-zero carbon emissions with a 100%
fossil-free fleet of vehicles by 2040 (see
page 25). And ICE will remain a staple.
" The internal combustion engine will
continue to exist in the future - after
2040, after 2050. Then we can ask ourselves,
what kind of fuel do we use, to
what extent are we able to use fossilfree
fuels like HVO, " Peter Voorhoeve,
president of Volvo Trucks North
America, said at ACT Expo during a
CEO Roundtable on Scaling Vehicle
Electrification. " The internal combustion
engine will [celebrate] its 200th birthday
in my opinion. "
Hybridization is a strategy that can
prolong the relevance of ICEs - and appears
to be growing in favor for certain
applications. In the first quarter of 2024,
Caterpillar began developing a hydrogenhybrid
powertrain for off-highway vehicles
that's built on its new C13D engine
platform (www.sae.org/news/2023/03/
cat-c13d-launch). The project aims to
demonstrate how the latest control systems
and electric-hybrid components can
help H2
-fueled engines meet or exceed
the power density and transient performance
of traditional diesel engines, while
lowering CO2
emissions.
John Deere continues to expand its
hybrid machine offerings, launching last
month two new production-class
E-Drive wheel loaders: the 744 and 824
X-Tier models. Rather than overtly calling
the machines " hybrids, " Deere uses
the X-Tier badge with E-Drive, or " electric
drive system, " to signal that its electric
variable transmission is on board.
Paired with a JD9 diesel engine, the EVT
replaces the torque converter and traditional
transmission to provide instant
power and deliver up to 25% reduced
TRUCK & OFF-HIGHWAY ENGINEERING
fuel consumption. Up to a 7% TCO lifecycle
advantage is possible versus conventional
drive systems, Deere claims.
" There's some areas where pure battery-electric
may not be feasible, may
not be ready in its current state, but
hybridization will be a great solution in
those situations, " Grant Van Tine, product
manager, electric vehicles, John
Deere, said at ACT Expo. Van Tine is
participating in SAE Media Group's
August 22 webinar on " The Future Role
of Hybrids in Off-Highway Vehicles. "
(Register at www.sae.org/webcasts.)
Heavy mining trucks are one of those
applications in which a hybrid powertrain
could be preferable, given the substantial
expense and weight of the batteries required
to fully electrify such vehicles. One
notable example: Cummins has commissioned
a diesel-battery solution in partnership
with the Chinese manufacturer
North Hauler Joint Stock Co., Ltd. The
hybrid NHL NTH260 mining truck has a
220 metric ton payload and is being field
tested at the Baiyun Iron Mine.
Cummins' hybrid system enabled engine
downsizing from the previous
2,500-hp QSK60 to the 2,000-hp twostage
QSK50. The truck is expected to
provide a leading TCO, the companies
claim, based on initial cost advantages,
fuel efficiency and extended service life
of the engine. Advanced hybrids have
the potential to improve fuel efficiency
up to 30%, according to Cummins, depending
on the mine profile and battery
technology and controls integration.
In this issue, a couple of on-highway
hybrid applications are detailed.
Hexagon Agility and Brudeli Green
Mobility are working together to electrify
existing CNG/RNG trucks by integrating
Brudeli's plug-in PowerHybrid system
(see page 4). On page 29, Kenworth's
chief engineer discusses the truck maker's
plans for hybrid technology.
Hybrid electric drives may be viewed
as an interim solution or " bridge " technology,
but it's looking like a long bridge.
Ryan Gehm, Editor-in-Chief
August 2024 1
http://www.sae.org/webcasts http://www.sae.org/news/2023/03/cat-c13d-launch http://www.sae.org/news/2023/03/cat-c13d-launch
Truck & Off-Highway Engineering - August 2024

Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - August 2024
