Forward-thinking automotive companies know how critical it is to secure greater fuel economy.

The standard diesel engine offers clear fuel consumption advantages vs. the gasoline engine, though it suffers from significant NOX control challenges.

No other diesel solution offers both greater fuel savings and decreased NOX tailpipe emissions – at the best value in the industry


What is dDSF?

Like DSF for gasoline engines, dDSF uses individual cylinder deactivation control strategies to meet torque demand at optimal fuel and aftertreatment efficiency

Key solution components include:

  • DSF Valvetrain: Individual cylinder deactivation capability
  • Engine controller with dDSF: Tula’s proprietary SW for smooth, efficient operation and fuel economy gains
  • dDSF offers the opportunity to decreased after-treatment costs
  • Additional synergies can be gained by coupling dDSF with hybridization

How does dDSF work?

dDSF Torque

Combustion Efficiency

dDSF improves fuel efficiency by firing all events at the most efficient ratio of air to fuel, allowing optimal combustion at all engine output levels.

Catalyst Efficiency

Cylinder deactivation reduces excess engine airflow, increasing exhaust temperatures. This allows for more efficient conversion of pollutants in the catalyst and reduced NOX, at no additional after treatment hardware cost.

dDSF is a unique solution in the diesel industry, in that it offers both fuel/CO2 savings, and NOX improvements, at an industry leading value to cost ratio

dDSF benefits are further improved by synergies between dDSF and hybridization: edDSF

Need more information about dDSF
or other Tula fuel efficiency solutions?

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