Daimler AG
The Mercedes-Benz Group AG (previously named Daimler-Benz, DaimlerChrysler and Daimler) is a German multinational automotive corporation headquartered in Stuttgart, Baden-Württemberg, Germany. It is one of the world's leading car manufactu ...
's Active Cylinder Control (ACC) is a
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. Many automobil ...
technology. It debuted in 2001 on the 5.8 L
V12 V12 or V-12 may refer to:
Aircraft
* Mil V-12, a Soviet heavy lift helicopter
* Pilatus OV-12, a planned American military utility aircraft
* Rockwell XFV-12, an American experimental aircraft project
* Škoda-Kauba V12, a Czechoslovak experim ...
in the
CL600 and
S600. Like
Chrysler's later
Multi-Displacement System Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2006 on the 5.7 L modern Hemi V8. Like Mercedes-Benz's Active Cylinder Control, General Motors' Active Fuel Management, and Hon ...
,
General Motors'
Active Fuel Management and
Honda
is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan.
Honda has been the world's largest motorcycle manufacturer since 1959, reaching a producti ...
's
Variable Cylinder Management
Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by using the i-VTEC system to disable one bank of cylinders during specific driving conditions—for example, highway driving. The second ...
, it deactivates one bank of the engine's cylinders when the throttle is closed.
In order to preserve the sound of the engines, DaimlerChrysler worked with Eberspaecher to design a special
exhaust system
An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall syste ...
for ACC-equipped vehicles. The system uses an active valve to divert exhaust between two different exhaust systems. It also has a
variable length intake manifold
In internal combustion engines, a variable-length intake manifold (VLIM),variable intake manifold (VIM), or variable intake system (VIS) is an automobile internal combustion engine manifold technology. As the name implies, VLIM/VIM/VIS can vary ...
system to optimize output in the two modes.
Applications
*
M138 V12 V12 or V-12 may refer to:
Aircraft
* Mil V-12, a Soviet heavy lift helicopter
* Pilatus OV-12, a planned American military utility aircraft
* Rockwell XFV-12, an American experimental aircraft project
* Škoda-Kauba V12, a Czechoslovak experim ...
2001–2002
See also
*
Chrysler's
Multi-Displacement System Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2006 on the 5.7 L modern Hemi V8. Like Mercedes-Benz's Active Cylinder Control, General Motors' Active Fuel Management, and Hon ...
(MDS)
*
General Motors'
Active Fuel Management (AFM)
*
Honda
is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan.
Honda has been the world's largest motorcycle manufacturer since 1959, reaching a producti ...
's
Variable Cylinder Management
Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by using the i-VTEC system to disable one bank of cylinders during specific driving conditions—for example, highway driving. The second ...
(VCM)
*
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. Many automobil ...
References
*
External links
Ward's article
{{Daimler AG
Mercedes-Benz Group
Engine technology
Automotive technology tradenames