Editing Active Fuel Management (section)

{{Short description|Trademarked variable displacement technology}}
{{for|other similar systems|variable displacement}}

'''Active Fuel Management''' (formerly known as '''displacement on demand''' ('''DoD''')) is a trademarked name for the [[car|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 in automobiles|fuel economy]]. Estimated performance on [[United States Environmental Protection Agency|EPA]] tests shows a 5.5–7.5% improvement in fuel economy.<ref>{{Cite web|url=https://www.sae.org/publications/technical-papers/content/2007-01-1292/|title=Active Fuel Management Technology: Hardware Development on a 2007 GM 3.9L V-6 OHV SI Engine|first1=Mark|last1=Stabinsky|first2=William|last2=Albertson|first3=Jim|last3=Tuttle|first4=David|last4=Kehr|first5=James|last5=Westbrook|first6=Henning|last6=Karbstein|first7=Mario|last7=Kuhl|date=April 16, 2007|doi=10.4271/2007-01-1292 |via=www.sae.org}}</ref>

GM's Active Fuel Management<ref>{{Cite web|url=https://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-active-fuel-management-cylinder-deactivation-technology/|title=General Motors Active Fuel Management Cylinder Deactivation Technology|website=GM Authority|date=30 November 2017 }}</ref> technology used a solenoid to deactivate the [[Tappet|lifters]] on selected cylinders of a [[Valvetrain|pushrod]] V-layout engine.

GM used the Active Fuel Management technology on a range of engines including with the GM Small Block Gen IV engine family, first-generation GM EcoTec3 engine family, second-generation GM High-Feature V6 DOHC engine family, and first-generation High-Feature V8 DOHC engine family. Vehicle applications included the 2005 Chevy TrailBlazer EXT, the GMC Envoy XL, Envoy XUV, and [[Pontiac Grand Prix]].