Eaton’s Mobility Group Chosen to Supply Electromechanical Variable Valve Actuation Technology to Great Wall Motor
23 Abril 2024 - 5:30AM
Business Wire
Intelligent power management company Eaton today announced it
has been chosen to supply an electromechanical actuation system
(EMAS) that can deliver an early intake valve closing (EIVC) to the
China-based automaker Great Wall for use in a line of
hybrid-electric vehicles (HEV).
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Eaton’s electromechanical actuation
system (EMAS) can be easily integrated into a valvetrain and the
cylinder head space and controlled by a simple electric actuator.
(Photo: Business Wire)
“Emissions regulations are driving the adoption of new
technologies by our global customers,” said Alessio Lorenzon,
global engineering manager, Valves, Eaton’s Mobility Group. “We’re
proud to supply Great Wall with our variable valve actuation
technology which, in combination with vehicle hybridization, will
improve fuel economy in their newest hybrid passenger vehicle
lineup.”
The Eaton EMAS is a discrete valvetrain-based technology that
allows manufacturers to select the intake lift that best fits the
engine map. At low to medium engine speed and torque, the system
delivers the EIVC function, reducing the air trapped in the
cylinder and the pumping losses, which increases overall engine
efficiency. When the engine requires maximum performance, the
system switches to the longer valve event, delivering the highest
output possible. Leveraging a system that can be easily integrated
into the valvetrain and the cylinder head space and controlled by a
simple electric actuator, the EMAS creates a balance between fuel
economy and performance.
Eaton’s innovative new system differs from traditional variable
valve actuation (VVA) solutions in that it includes switchable
rockers, a mechanical actuation shaft controlling the switching of
the rockers, and an electric actuator driving the actuation system
on demand. This configuration makes the system unaffected by
varying oil temperatures, which enables fast system switching
across a very wide working range of the engine. This also enables a
safe rocker switch at high engine speed.
“Our EMAS was conceived to be easily scaled and a minor
modification of the mechanical link between the actuator and rocker
arms allows the system to be used in all engine families from three
to six cylinders,” Lorenzon said. “The switchable rocker arm is
composed of stamped and cold-formed parts, which helps
manufacturability without impacting performance.”
Learn more about Eaton’s variable valve actuation solutions.
Eaton is an intelligent power management company dedicated to
protecting the environment and improving the quality of life for
people everywhere. We make products for the data center, utility,
industrial, commercial, machine building, residential, aerospace
and mobility markets. We are guided by our commitment to do
business right, to operate sustainably and to help our customers
manage power ─ today and well into the future. By capitalizing on
the global growth trends of electrification and digitalization,
we’re accelerating the planet’s transition to renewable energy
sources, helping to solve the world’s most urgent power management
challenges, and building a more sustainable society for people
today and generations to come.
Eaton was founded in 1911 and has been listed on the New York
Stock Exchange for more than a century. We reported revenues of
$23.2 billion in 2023 and serve customers in more than 160
countries. For more information, visit www.eaton.com. Follow us on
LinkedIn.
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Thomas Nellenbach (216) 333-2876 (cell)
thomasjnellenbach@eaton.com