Multi-Displacement System: Difference between revisions

Revision as of 15:43, 5 May 2005

Revision as of 04:34, 24 March 2006

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[[DaimlerChrysler]]'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]]' [[Displacement on Demand]], and [[Honda]]'s [[Variable Cylinder Management]], it deactivates one bank 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 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).

In order to preserve the characteristic rumble of the V8 engines, Chrysler and Eberspaecher North America designed a special exhaust system for MDS-equipped vehicles. This includes four separate mufflers, two large central ones for V8 mode and two smaller ones near the tailpipes for [[straight-4]] operation. Unlike the system used on [[Mercedes-Benz]] [[V12]] engines, also designed by Eberspaecher, the system is mechanically passive.

Applications:

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==See also==

* [[Variable displacement]]

==External links==

* [http://waw.wardsauto.com/ar/auto_give_deactivation_due_2 Ward's article]

* [http://waw.wardsauto.com/ar/auto_twicetuned_hemi_2 Ward's article]

[[Category:Chrysler]]

[[Category:Engine technology]]

[[Category:Chrysler]]