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The Chrysler Group Multi-Displacement
System (MDS) is a fuel-saving cylinder deactivation technology that
is here today — customers get the power and capability of the HEMI®
V-8 that they desire with an improvement in fuel economy of up to 20
percent.
“By 2007, Chrysler Group will have nearly one-million vehicles on
the road with MDS,” said Eric Ridenour, Executive Vice President –
Product Development, Chrysler Group. “And 60 million gallons of fuel
will be saved annually with the HEMI engine’s MDS technology.”
Chrysler Group is now the first to offer MDS in a pickup truck – the
2006 Dodge Ram 1500. The company was the first to offer cylinder
deactivation in an SUV with the introduction of MDS in the 2005
HEMI-powered Jeep® Grand Cherokee. It was also the first to offer
modern, large-volume vehicles in North America with cylinder
deactivation — the HEMI-powered 2005 Chrysler 300C and
Dodge Magnum R/T went on sale in the spring of 2004 with the
Chrysler Group MDS.
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. This optimizes fuel economy when
V-8 power is not required, without sacrificing vehicle performance
or capability.
The MDS was part of the engine's original design. 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 seamlessly transition from eight
cylinders to four in 40 milliseconds (0.040 seconds).
The Chrysler Group MDS is standard equipment on the Chrysler 300C,
Dodge Magnum R/T and
Dodge Charger R/T, and standard on the HEMI-powered Dodge
Durango, Dodge Ram 1500, Jeep Grand Cherokee and Jeep Commander. |
