Cummins, Tula Demonstrate Emission-Reducing Diesel Technology April 13, 2021 Cummins Inc., a corporation of business segments that design, manufacture, distribute and service power solutions, and Tula Technology Inc., a company that specializes in propulsion efficiency, have unveiled the results of their collaborative study on the effectiveness of Tula’s diesel Dynamic Skip Fire (dDSF) in reducing nitrogen oxides (NOx) and carbon dioxide (CO2) emissions on a Cummins X15 HD Efficiency Series diesel engine. 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.