USA – Results of the previously announced collaborative study on the effectiveness of Tula’s diesel Dynamic Skip Fire* (dDSF) control software – an advanced cylinder deactivation control system - in reducing nitrogen oxides (NOx) and carbon dioxide (CO2) emissions on a Cummins X15 HD Efficiency Series diesel engine have been released at the Society of Automotive Engineers World Congress that took place in April in Detroit, by Cummins Inc of Columbus, Indiana and Tula Technology Inc, a specialist in propulsion efficiency, based in San Jose, California.

Low-load cycle performance was estimated with a well-calibrated powertrain simulation tool to accurately capture the low-load system operation and emissions. This system showed a 74% reduction in NOx and a 5% reduction in CO2 compared with today’s clean diesel technologies. In comparison with current engine technologies and modifications to the thermal management techniques, dDSF saved 20% in fuel, validating dDSF as a more fuel-efficient means of reducing NOx.