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m MDS is available on the Ram 1500 only, not all Rams |
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[[Chrysler]]'s '''Multi-Displacement System''' (MDS) is an [[automobile]] engine [[variable displacement]] technology. It debuted in [[2004]] on the 5.7 L [[Chrysler Hemi engine|modern Hemi]] [[V8]]. Like [[Mercedes-Benz]]'s [[Active Cylinder Control]], [[General Motors Corporation|General Motors]]' [[Active Fuel Management]], and [[Honda]]'s [[Variable Cylinder Management]], it deactivates four of the V8's cylinders when the throttle is closed.
The system was first offered only on passenger cars, since the heavy demands of trucks would interfere with its operation. However, it was recalibrated for [[2006]] and will be offered on all seven models, including SUV's and 1500 series trucks, using the 5.7 L engine.
Chrysler expects that the technology will boost economy by 10% to 20%. In the [[Jeep Grand Cherokee]] with MDS, highway fuel mileage for the V8 is the same as the V6 at 21 mpg (11.2 liters per 100 km).
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