DIESEL WORLD MAGAZINE COMPILED BY DW STAFF
Breaking new ground in NOx reduction, Cummins (in collaboration with Tula Technology) has successfully experimented with cylinder deactivation strategies. A Cummins X15 Efficiency Series engine served as the test mule, with its engine control system being integrated with Tula Technology’s Dynamic Skip Fire (DSF) control algorithms to command combustion or deactivation on a cylinder event basis. During low-load cycle emissions testing (what is being proposed by CARB), modeling of dDSF technology predicted reductions in tailpipe NOx output while reducing CO2 at the same time. While cylinder deactivation technology isn’t required to meet current NOx standards, it may prove vital in meeting future emission targets. Another side effect has been a reduction in fuel consumption.