News – Page 6 – Tula Technology

But General Motors demonstrates with its silky 420-hp 6.2L V-8 in the ’19 Chevy Silverado (see dashboard photo, lower left) that there are ways to wring more efficiency from them through good old-fashioned engineering. The updated small-block 6.2L uses what GM calls Dynamic Fuel Management, the automaker’s most advanced cylinder-deactivation technology. DFM raises fuel economy in the Silverado by 1 mpg (0.4 km/L) in the city cycle on the federal testing procedure and 2 mpg (0.8 km/L) in real-world driving. The trick is the system’s 17 different deactivation patterns. A sophisticated controller determines 80 times per second how many cylinders need fuel, and the system is constantly switching the firing sequence depending on driving conditions and throttle inputs. It happens so seamlessly, the only thing the driver notices is fewer stops at the pump.