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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-load conditions to improve fuel economy.
The oldest engine technological predecessor for the variable-displacement engine is the hit and miss engine, developed in the late 19th century.These single-cylinder stationary engines had a centrifugal governor that cut the cylinder out of operation so long as the engine was operating above a set speed, typically by holding the exhaust valve open.
Honda J35A 3.5L V6 SOHC i-VTEC Variable Cylinder Management(VCM) Engine on 2008 Honda Inspire. 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 Cadillac High Technology Engine was a V8 engine produced by the Cadillac division of General Motors from 1982 to 1995.. While the High Technology engine was being developed, due to higher Corporate Average Fuel Economy standards being phased in by the United States government, Cadillac introduced a variant of their traditional V8 engine with the first usage of cylinder deactivation for ...
Forced induction, and cylinder deactivation options were engineered into the engine design, but have not been implemented from the factory, remaining "on the shelf" as of 2016. [4] Insiders initially reported that the engine would come in four basic sizes (3.0, 3.3, 3.6, and 4.0 L), each offered in various states of tune.
The federal investigation covers select Chevrolet, Cadillac, and GMC trucks and SUVs built with the 6.2-liter L87 V-8 between the 2019 and 2024 model years.
Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2005 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.
This Cadillac would essentially have had two 3.6L High Feature V6s attached crankshaft-to-crankshaft and would have featured high-end technologies including direct injection and cylinder deactivation. If this engine were developed, it would have displaced 7.2 liters, and produced approximately 600 hp (447 kW; 608 PS) and 540 lb⋅ft (732 N⋅m ...