Winning Today and Tomorrow with GM’s Dynamic Fuel Management Technology

Awarded for its technical prowess and deactivation technology, General Motors’ dynamic fuel management is a revolutionary system for internal combustion engines.

Pushing to create a world with zero crashes, zero emissions and zero congestion, General Motors is advancing its lineup of current vehicles while simultaneously investing in electrification, autonomy and services like Maven.

General Motors’ dynamic fuel management technology, built at the Tonawanda Engine facility in New York, is a revolutionary system for internal combustion engines.

This technology allows the engine to turn cylinders off when driving in situations that don’t require full power, like cruising on the freeway. The DFM system’s multiple cylinder-firing patterns are seamlessly mixed to meet the driver’s requested torque while helping to balance fuel economy. Customers are given combinations of performance and efficiency to best fit their driving needs.

The 5.3L and 6.2L engines with DFM utilize control software written by General Motors software engineers. Of the nearly 2.9 million lines of code operating the engines, over 65,000 are dedicated to DFM. The engine control module makes decisions on which cylinders to activate or deactivate up to 80 times per second.

Watch how the torque-based technology activates and deactivates cylinders based on customer need.

Earlier this year, General Motors announced a $22 million investment at its Spring Hill, Tennessee, manufacturing complex to build V-8 DFM engines.

“This investment will enable our Spring Hill team to continue building our award-winning engines enhanced with technology that will improve fuel efficiency and performance for our customers,” said GM Chairman and CEO Mary Barra. “This investment reflects our commitment to vehicles and technologies our customers desire today and in the future.”