LISLE, Ill., Oct. 20, 2021 /PRNewswire/ -- Navistar today
announced significant updates to the International® A26
engine, now allowing fleets to achieve 10% improved fuel economy
since the engine's initial launch.
Significant updates to the International A26 engine allow fleets to
achieve 10% improved fuel economy.
Previous design and system updates account for a 6% fuel
efficiency improvement, while the latest engine enhancements to the
A26 (2021 GHG) provide an additional 4% fuel economy benefit.
"These latest updates to the International A26 highlight
Navistar's ongoing commitment to improved vehicle efficiency and
total cost of ownership for our customers," said Diane Hames, vice president, Marketing. "Our key
drive continues to be meeting the demands of our customers today
while helping them plan for the road ahead. Every incremental
change helps to forge a path toward that more efficient
The previous updates contributing to the 6% fuel efficiency
improvement include more optimized engine and transmission
calibrations mated with the Eaton Endurant automated manual
transmission, a direct drive 2.15 ratio, and aerodynamic
improvements to wheel coverings on drive axle wheels and the
The latest engine enhancements to the A26 (2021 GHG) that
provide an additional 4% fuel economy benefit are achieved through
engine design and system updates, including:
- Combustion enhancements: An increased compression
ratio from 18.5:1 to 20.5:1, delivers higher combustion efficiency,
along with maximized fuel injection pressure from the 2500 bar high
pressure common rail fuel system.
- Optimized engine temperature control: The efficient
design of the cylinder head coolant passages helps to reduce
parasitic loss at the water pump, as well as the addition of a
variable water pump provides more optimized run time versus
- Air management system updates: An optimized exhaust
gas recirculation (EGR) cooler and intake throttle valve create
more efficient charge air flow. Additionally, the Variable Geometry
Turbocharger delivers the desired boost air pressure across a wide
range of engine speeds, loads and elevation.
- Reduced engine speed without compromising power: A
higher horsepower output provides maximum power when needed, while
operating at lower rotations per minute (rpm) optimizes the amount
of fuel consumed during operation.
The latest generation International A26 13-liter engine was
designed to provide greater fuel efficiency without sacrificing
power. Built from the proven MAN D26 engine crankcase, this latest
version of the International A26 produces up to 515 horsepower and
1,850 lb.-ft. of torque.
"The updated International A26 provides the horsepower you'd
expect from a 15L engine, while working harder at lower engine
speeds," said Chet Ciesielski, vice
president, On-Highway Truck Business. "The active torque management
at the pedal delivers the required amount of torque at the moment
it's needed while providing a smoother shifting experience for the
The A26 engine is available for order in the
International® LT® Series of long-haul
vehicles, RH™ Series of regional haul vehicles, the HX®
Series for heavy-haul and various construction applications and the
HV™ Series for select vocational applications.
The latest generation International A26 will be on display
during the American Trucking Associations' Management Conference
and Exhibition (MCE) October 24-26 in
Nashville, Tenn. at booth #4131.
To learn more, visit
Navistar, Inc. ("Navistar") is a
purpose-driven company, reimagining how to deliver what matters to
create more cohesive relationships, build higher-performing teams
and find solutions where others don't. Based in Lisle, Illinois, Navistar or its subsidiaries
and affiliates produce International® brand commercial
trucks and engines, IC Bus® brand school and commercial
buses, all-makes OnCommand® Connection advanced
connectivity services, and Fleetrite®,
ReNEWeD® and Diamond Advantage® brand
aftermarket parts and includes a Brazilian manufacturer of engines
and gensets, MWM Motores Diesel e Geradores. With a history of
innovation dating back to 1831, Navistar has more than 12,000
employees worldwide and is part of TRATON SE, a global champion of
the truck and transport services industry. Additional
information is available at www.Navistar.com.
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SOURCE Navistar International Corporation