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The 2005 Chrysler 300C and
Dodge Magnum R/T are the first modern, high-volume production
vehicles in North America to feature fully functioning cylinder
deactivation. The Multi-Displacement System (MDS) will be standard
equipment with the 5.7-liter HEMI® engine.
"The Chrysler Group MDS seamlessly alternates between smooth, high
fuel economy four-cylinder mode when less power is needed, and V-8
mode when more power from the
5.7L HEMI engine is in demand," said Eric Ridenour, Executive
Vice President – Product Development, Chrysler Group. "This
optimizes fuel economy when V-8 power is not needed, without
sacrificing vehicle performance — 2005 Chrysler 300C and
Dodge Magnum R/T owners will get the maximum benefit without any
compromises."
The HEMI-powered 2005 Jeep® Grand Cherokee will also come equipped
with MDS as standard equipment. Owners of the Chrysler 300, Dodge
Magnum and Jeep Grand Cherokee will receive the powerful benefit of
the HEMI engine with the fuel economy that they would only expect
from a smaller, less powerful engine.
"The MDS was part of the engine's original design," said Bob Lee,
Vice President – Powertrain Product Team, Chrysler Group. "This
resulted in a cylinder-deactivation system that is elegantly simple
and completely integrated into the engine design. The benefits are
fewer parts, maximum reliability and lower cost."
Some of the significant technologies enabling the Chrysler Group MDS
are the speed of electronic controls, the sophistication of the
algorithms controlling the systems and the use of Electronic
Throttle Control. The HEMI can transition from eight cylinders to
four in 40 milliseconds (0.040 seconds).
The HEMI engine with MDS has completed over 6.5 million
customer-equivalent miles through Chrysler Group's development and
durability testing. It is covered by the 7-Year/70,000-mile Limited
Powertrain Warranty.
The system deactivates the valve lifters. This keeps the valves in
four cylinders closed, and there is no combustion. In addition to
stopping combustion, energy is not lost by pumping air through these
cylinders.
Customers will experience estimated fuel economy gains of up to 20
percent under various driving conditions, and a projected 10 percent
aggregate improvement. Improved fuel economy is realized without any
change in customer experience — drivers will receive the benefit
without changing their driving habits and without compromising
style, comfort or convenience. |
