DSF works synergistically with multiple advanced engine and vehicle technologies such as Miller-cycle and Atkinson-cycle engines, compressed natural gas and other alternative fuels as well as connected and autonomous vehicles.
Miller-cycle engines hold fuel economy promise, but on a stand-alone basis are limited by efficiency-performance trade-offs
DSF® works synergistically with this advanced engine combustion strategy to strengthen its advantages while addressing its challenges.
mDSF more than doubles the fuel efficiency improvement of Miller-cycle engines on a stand-alone basis, while lowering the cost per percent improvement.
How mDSF works
mDSF couples DSF with Miller-cycle engines to further increase each cylinder’s firing options with high-fire, low-fire and skip to match torque demand always at optimum efficiency without sacrificing drivability.
Dynamic charge management using mDSF has synergistic benefits beyond those provided by DSF and Miller-cycle engines individually.
noise, vibration, harshness
Only a few years ago, self-driving cars were considered science-fiction
Today, autonomous cars are a rapidly evolving technology. These vehicles are designed to be wirelessly connected to each other and the cloud infrastructure, providing the engine controller actionable information about vehicle position, traffic, terrain, obstacles, traffic light changes, and more.
How DSF works in tandem with Autonomous
The blue curve in the graph illustrates a typical drive cycle of rapid accelerations, slowdowns, braking and stops. The orange curve is for an autonomous vehicle that anticipates traffic signals and other obstacles.
aDSF delivers significant fuel efficiency gains by not only optimizing for the autonomous drive cycle but also optimizing the drive cycle itself. Moreover, autonomous cars can be fully unoccupied at various times, unconstrained by noise, vibration and harshness issues, leading to further aDSF efficiency benefits.
Tula’s research and development publications on
advanced applications using Autonomous
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Tula’s DSF control strategies can be applied to engines designed to use alternative fuels, both improving powertrain efficiency and reducing harmful emissions
According to U.S. Energy Information Administration, alternative fuels are projected to grow much faster than petroleum in the transportation sector. With DSF for gasoline, diesel, and alternative fuels, plus DMD technology for electric vehicles, Tula is poised to further improve emission and cost benefits for decades into the future.