Multi-Displacement System: Difference between revisions

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{{Short description|Chrysler automobile technology}}

[[DaimlerChryslerChrysler]]'s '''Multi-Displacement System''' ('''MDS''') is an [[automobile]] engine [[variable displacement]] technology. It debuted in [[2004]]2005 on the 5.7 L [[Chrysler Hemi engine#Third generation: 2003-present|modern Hemi]] [[V8 engine|V8]]. Like [[Mercedes-Benz]]'s [[Active Cylinder Control]], [[General Motors Corporation|General Motors]]' [[DisplacementActive onFuel DemandManagement]], and [[Honda]]'s [[Variable Cylinder Management]], it deactivates one bankfour of the V8's cylinders when the throttle is closed or at steady speeds.

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 bewas offered on all seven models, including SUVs and 1500 series trucks, using the 5.7 L engine.

Chrysler expectsexpected that the technology willwould 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 [[straightfour-4]]cylinder operationmode. Unlike the system used on [[Mercedes-Benz]] [[V12 engine|V12]] engines, also designed by Eberspaecher, the system is mechanically passive.

Applications:

* 20042005–2023 [[Chrysler 300|Chrysler 300C]]

* 20042005–2008 [[Dodge Magnum#Chrysler LX platform (2005–2008)|Dodge Magnum]]

* 20052005–Present [[Jeep Grand Cherokee]]

* 2005 [[Dodge Charger]]

* 2006–2023 [[Dodge Charger (LX)|Dodge Charger]]

* 2005 [[Jeep Grand Cherokee]]

* 20062006–2009, 2011-Present [[Dodge Durango]]

* 20062006–Present [[Ram pickup|Dodge Ram/Ram pickup]] (1500 only)

* 20062006–2010 [[Jeep Commander (XK)|Jeep Commander]]

* 2007–2009 [[Chrysler Aspen]]

* 2009–2023 [[Dodge Challenger#Third generation (2008–present)|Dodge Challenger]]

* 2021-Present [[Jeep Wrangler (JL)|Jeep Wrangler Rubicon 392]]

* 2022-Present [[Jeep Wagoneer (WS)|Jeep Wagoneer]]

==See also==

* [[Daimler AG]]'s [[Active Cylinder Control]] (ACC)

* [[Displacement on Demand]]

* [[General Motors Corporation|General Motors]]' [[Active Fuel Management]] (AFM)

* [[Honda]]'s [[Variable Cylinder Management]] (VCM)

* [[Variable displacement]]

==External links==

* [https://web.archive.org/web/20040515013706/http://waw.wardsauto.com/ar/auto_give_deactivation_due_2/ "Give Deactivation its Due" – Ward's Auto World via archive.org]

* [https://web.archive.org/web/20050115105733/http://waw.wardsauto.com/ar/auto_twicetuned_hemi_2/ "Twice-Tuned Hemi" – Ward's Auto World via archive.org]

[[Category:Chrysler]]

* [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:Engine technology]]

[[Category:Chrysler]]