Cylinder deactivation and heated catalytic converters are part of Eaton's plan for cutting emissions for future regulations including Euro VII
Eaton Vehicle Group has reported that 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.
“Our CDA technology has proven it can help our customers meet increasingly strict emissions regulations for diesel engines,” Engine Air Management business unit directorChristopher Mancuso said.
“This comes at a time when many global manufacturers are determining what technologies they will leverage in next-generation vehicles to reduce harmful emissions.”
New emissions regulations spearheaded by the California Air Resources Board (CARB), US 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.
Rapid catalyst warm-up essential
Eaton partnered with the Southwest Research Institute (SwRI), one of the oldest and largest independent, nonprofit, applied research and development organisations in the US, 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 per cent at idle,” the firm stated.
“Previous results utilising CDA and a close-coupled SCR catalyst demonstrated compliance to forthcoming US regulations for NOx and CO2 emissions for diesel commercial vehicles.
“Eaton’s 2021 testing with SwRI showed further advancement, dropping NOx levels by 99.4 per cent 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.”
CDA technology is said to benefit vehicle manufacturers facing tightening emissions standards in Europe as well. The next set of requirements, known as Euro VII for heavy-duty trucks, is targeted for the second part of the decade.
In the US, CARB is introducing more stringent regulations as soon as 2024, while the EPA has circled 2027 to begin applying stricter emissions limits on new-model heavy-duty vehicles.
Collectively, these standards are designed to reduce tailpipe NOx emissions up to 90 per cent, accelerating the need for global engine manufacturers to employ additional emissions-reduction strategies such as electric catalyst heating. Eaton says this technology is an example of how the company is progressing toward achieving its 2030 sustainability targets.
By 2030, the company aims to reduce emissions from its solutions and throughout its value chain by 15%.