Eaton announced its Vehicle Group has demonstrated cylinder deactivation (CDA) as an effective technology for meeting future global emissions requirements for diesel-engine powered commercial vehicles. To date, the technology has been evaluated with a close-coupled selective catalytic reduction (SCR) aftertreatment system with and without a 48-volt electric heater. New emissions regulations spearheaded by the California Air Resources Board (CARB), U.S. Environmental Protection Agency (EPA) and European Commission (EC) are slated for adoption in coming years. These agencies, in concert with other national and international regulators, seek to significantly reduce greenhouse gas (GHG) emissions and harmful air pollutants produced primarily by heavy-duty trucks, vans and buses. Eaton partnered with the Southwest Research Institute (SwRI), to demonstrate the feasibility of its Vehicle Group?s technology. The findings demonstrate that using CDA and a close-coupled SCR catalyst reduced both nitrous oxide (NOx) and carbon dioxide (CO2) emissions with fuel consumption savings of up to 40% at idle. Previous results utilizing CDA and a close-coupled SCR catalyst demonstrated compliance to forthcoming U.S. regulations for NOx and CO2 emissions for diesel commercial vehicles. Testing with the new low-load cycle (LLC) resulted in a 5% drop in CO2 while dramatically reducing NOx. The assessment was developed by CARB to replicate real-world urban tractor and vocational vehicle operations at low engine loads. Eaton?s 2021 testing with SwRI showed further advancement, dropping NOx levels by 99.4% on the composite federal test procedure (FTP) and lowering the LLC NOx to well within current guidelines. Notably, using the same aftertreatment system with the addition of a 48-volt electric heater located upstream of the SCR further achieved a reduction in CO2.