Daimler AG
The Mercedes-Benz Group Aktiengesellschaft, AG (previously named Daimler-Benz, DaimlerChrysler and Daimler) is a German Multinational corporation, multinational automotive corporation headquartered in Stuttgart, Baden-Württemberg, Germany. It ...
'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 automobile ...
technology. It debuted in 2001 on the 5.8 L
V12 in the
CL600 and
S600. Like
Chrysler
Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automot ...
's later
Multi-Displacement System,
General Motors'
Active Fuel Management
Active Fuel Management (formerly known as displacement on demand (DoD)) 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-l ...
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, 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 system ...
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 2001–2002
See also
*
Chrysler
Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automot ...
's
Multi-Displacement System (MDS)
*
General Motors'
Active Fuel Management
Active Fuel Management (formerly known as displacement on demand (DoD)) 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-l ...
(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 (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 automobile ...
References
*
External links
Ward's article
{{Daimler AG
Mercedes-Benz Group
Engine technology
Automotive technology tradenames