Active Fuel Management
E774291
Active Fuel Management is General Motors' cylinder deactivation technology that improves fuel efficiency in V6 and V8 engines by temporarily shutting off select cylinders under light-load conditions.
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
cylinder deactivation technology
ⓘ
fuel-saving engine technology ⓘ |
| activationCondition |
light-load driving
ⓘ
low engine torque demand ⓘ steady highway cruising ⓘ |
| alsoKnownAs |
AFM
NERFINISHED
ⓘ
Displacement on Demand NERFINISHED ⓘ |
| appliedTo | GM High Feature V6 engines NERFINISHED ⓘ |
| appliesTo |
V6 engines
ⓘ
V8 engines ⓘ |
| benefit |
improved highway fuel economy
ⓘ
lower CO2 emissions compared to non-deactivation engines ⓘ reduced fuel use in part-throttle operation ⓘ |
| category |
automotive technology
ⓘ
internal combustion engine technology ⓘ |
| controlledBy | engine control unit ⓘ |
| controls |
exhaust valves
ⓘ
fuel injection to selected cylinders ⓘ intake valves ⓘ |
| deactivationCondition |
high engine load
ⓘ
strong acceleration ⓘ |
| developer | General Motors NERFINISHED ⓘ |
| firstUsedIn |
5.3L V8 truck engines
ⓘ
Cadillac Escalade NERFINISHED ⓘ Chevrolet Silverado NERFINISHED ⓘ Chevrolet Tahoe NERFINISHED ⓘ GM small-block V8 engines ⓘ GMC Sierra NERFINISHED ⓘ GMC Yukon NERFINISHED ⓘ Gen IV small-block V8 family NERFINISHED ⓘ |
| introducedBy | General Motors Powertrain Division NERFINISHED ⓘ |
| introducedIn | mid-2000s ⓘ |
| manufacturer | General Motors ⓘ |
| operatingPrinciple |
switches engine between full-cylinder and reduced-cylinder operation
ⓘ
temporarily deactivates select cylinders under light-load conditions ⓘ |
| purpose |
improve fuel efficiency
ⓘ
reduce exhaust emissions ⓘ reduce fuel consumption ⓘ |
| regionUsed |
Australia
NERFINISHED
ⓘ
North America NERFINISHED ⓘ |
| successorTechnology | Dynamic Fuel Management NERFINISHED ⓘ |
| tradeOff |
increased valvetrain complexity
ⓘ
possible low-speed vibration or noise ⓘ potential lifter reliability issues ⓘ |
| typicalDeactivationMode |
6-cylinder to 3-cylinder operation
GENERATED
ⓘ
8-cylinder to 4-cylinder operation GENERATED ⓘ |
| usedInBrand |
Buick
NERFINISHED
ⓘ
Cadillac NERFINISHED ⓘ Chevrolet NERFINISHED ⓘ GMC NERFINISHED ⓘ Holden NERFINISHED ⓘ |
| uses |
electro-hydraulic valve lifters
ⓘ
engine control module ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.