While Mazda embraces the internal-combustion engine with a gasoline-powered HCCI mill, General Motors is taking a different approach. A new report states GM’s next generation pickups—the 2019 Chevrolet Silverado and 2019 GMC Sierra—may arrive with Dynamic Skip Fire technology or DSF.
DSF is revolutionary technology from Delphi and Tula Technology that controls the engine’s power by varying the number of cylinders needed. For example, the GMC Yukon Denali requires just 30 horsepower to cruise along at highway speeds. DSF shuts down six of the SUV’s eight cylinders to provide only the power needed to improve fuel efficiency by an estimated 21 percent.
DSF works by controlling engine oil flow via special valve lifters on each cylinder and works in concert with the throttle system. It’s essentially software-enabled variable displacement.
General Motors has invested in Tula in the past and has worked closely with the two companies to bring the system to production. Automotive News reports the automakers’ next pickup trucks are a logical step. It would replace the current cylinder deactivation systems.
Delphi has also developed the system to include a 48-volt plug-in hybrid system as well, which could help automakers grapple with hurdles posed by diesel fuel’s uncertain future in markets around the world. Delphi says DSF will cost $350 per vehicle for automakers that choose to implement the technology.
It’s been expected the system would reach the market in 2020, which also nearly aligns with the introduction of GM’s next-generation pickups.