Multi-Displacement System
Encyclopedia
Chrysler
's Multi-Displacement System (MDS) is an automobile
engine variable displacement
technology. It debuted in 2004 on the 5.7 L modern Hemi
V8. Like Mercedes-Benz
's Active Cylinder Control
, General Motors' Active Fuel Management
, and Honda
's Variable Cylinder Management
, it deactivates four 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 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).
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 four cylinder mode. Unlike the system used on Mercedes-Benz
V12
engines, also designed by Eberspaecher, the system is mechanically passive.
Applications:
Chrysler
Chrysler Group LLC is a multinational automaker headquartered in Auburn Hills, Michigan, USA. Chrysler was first organized as the Chrysler Corporation in 1925....
's Multi-Displacement System (MDS) is an automobile
Automobile
An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...
engine variable displacement
Variable displacement
Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large, multi-cylinder engines...
technology. It debuted in 2004 on the 5.7 L modern Hemi
Chrysler Hemi engine
The Chrysler Hemi engine, known by the trademark Hemi, is a series of V8 engines built by Chrysler with a hemispherical combustion chamber. Three different types of Hemi engines have been built by Chrysler for automobiles: the first from 1951–1958, the second from 1964–1971, and the third...
V8. Like Mercedes-Benz
Mercedes-Benz
Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...
's Active Cylinder Control
Active Cylinder Control
Daimler AG's Active Cylinder Control is a variable displacement technology. It debuted in 2001 on the 5.8 L V12 in the CL600 and S600...
, General Motors' Active Fuel Management
Active Fuel Management
Active Fuel Management is a trademarked name for the automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy...
, and Honda
Honda
is a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...
's Variable Cylinder Management
Variable Cylinder Management
Variable Cylinder Management is Honda's term for a variable displacement technology. It uses the i-VTEC system to disable one bank of cylinders during specific driving conditions to save fuel. The 2008 Accord takes this a step further allowing the engine to go from 6 cylinders, down to 4, and...
, it deactivates four 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 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
Jeep Grand Cherokee
The Jeep Grand Cherokee is a Mid-size SUV produced by the Jeep division of Chrysler. While some other SUVs were manufactured with body on frame construction, the Jeep Grand Cherokee has always used a unibody chassis.- Development :...
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 four cylinder mode. Unlike the system used on Mercedes-Benz
Mercedes-Benz
Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...
V12
V12 engine
A V12 engine is a V engine with 12 cylinders mounted on the crankcase in two banks of six cylinders, usually but not always at a 60° angle to each other, with all 12 pistons driving a common crankshaft....
engines, also designed by Eberspaecher, the system is mechanically passive.
Applications:
- 2005- Chrysler 300C
- 2005- Dodge ChargerDodge Charger (LX)The Dodge Charger LX is a rear-wheel drive four-door automobile introduced in February 2005. Built by Chrysler for its North American Dodge brand, the car was created to continue the Dodge Charger line, and replaced the Dodge Intrepid as Dodge's full-size sedan...
- 2005- Dodge MagnumDodge MagnumThe Dodge Magnum name has been used on a number of different automobiles. The most recent is a large rear-wheel drive station wagon introduced in 2004 for the 2005 model year and produced through to 2008. This new Magnum is Dodge's first car to use the new Chrysler LX platform, shared with the...
- 2005- Jeep Grand CherokeeJeep Grand CherokeeThe Jeep Grand Cherokee is a Mid-size SUV produced by the Jeep division of Chrysler. While some other SUVs were manufactured with body on frame construction, the Jeep Grand Cherokee has always used a unibody chassis.- Development :...
- 2006- Dodge DurangoDodge DurangoThe Dodge Durango is a full-size crossover SUV from the Dodge division of Chrysler. It was introduced in 1998 as a mid-size SUV, and as a replacement for the Ramcharger discontinued in the North American market in 1993, and was redesigned to full-size for 2004....
- 2006- Dodge RamDodge RamThe Dodge Ram is a full-size pickup truck manufactured by the Chrysler Group LLC. As of late 2010, it has been sold under the Ram Trucks brand. Previously, Ram was part of the Dodge lineup of light trucks...
(1500 only) - 2006- Jeep CommanderJeep CommanderThe Jeep Commander is a mid size SUV produced from 2006 to 2010. The first use of the Commander name on a passenger vehicle was the popular Studebaker Commander which was produced from the 1920s through 1966....
- 2007- Chrysler AspenChrysler AspenThe Chrysler Aspen is a full-size sport utility vehicle from Chrysler. Launched for the 2007 model year, the Aspen is essentially a rebranded Dodge Durango SUV...
- 2009- Dodge Challenger
See also
- Variable displacementVariable displacementVariable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large, multi-cylinder engines...
- HondaHondais a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...
's Variable Cylinder ManagementVariable Cylinder ManagementVariable Cylinder Management is Honda's term for a variable displacement technology. It uses the i-VTEC system to disable one bank of cylinders during specific driving conditions to save fuel. The 2008 Accord takes this a step further allowing the engine to go from 6 cylinders, down to 4, and...
(VCM) - General Motors' Active Fuel ManagementActive Fuel ManagementActive Fuel Management is a trademarked name for the automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy...
(AFM) - Daimler AG's Active Cylinder ControlActive Cylinder ControlDaimler AG's Active Cylinder Control is a variable displacement technology. It debuted in 2001 on the 5.8 L V12 in the CL600 and S600...
(ACC)