Eaton’s vehicle group has demonstrated that cylinder deactivation (CDA) is an effective technology for meeting future global emissions requirements for diesel-powered utility vehicles, the company said. In a press release, Eaton explained that to date, the technology has been evaluated with a one-piece Selective Catalytic Reduction (SCR) aftertreatment system with and without 48-volt electric heater.
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New emissions regulations led by the California Air Resources Board (CARB), the United States Environmental Protection Agency (EPA) and the European Commission (EC) are expected to be adopted in the coming years. These agencies, along with other national and international regulators, seek to significantly reduce greenhouse gas (GHG) emissions and harmful air pollutants produced primarily by heavy trucks, vans and buses.
Rapid preheating of essential catalyst
Eaton has partnered with the Southwest Research Institute (SwRI), one of the oldest and largest independent nonprofit applied research and development organizations in the United States, to demonstrate the feasibility of its group’s technology. vehicles. Results demonstrate that the use of CDA and a tightly coupled SCR catalyst reduced nitrous oxide (NOx) and carbon dioxide (CO2) emissions with fuel consumption savings of up to 40% at idle, Eaton said.
Previous results using CDA and a tightly coupled SCR catalyst have demonstrated compliance with upcoming US regulations regarding NOx and CO2 emissions for diesel utility vehicles. Testing with the new low load cycle (LLC) resulted in a 5% drop in CO2 while significantly reducing NOx. The assessment was developed by CARB to replicate the actual operations of urban tractors and professional vehicles with low engine load.
Eaton’s 2021 testing with SwRI showed further progress, dropping NOx levels by 99.4% on the Federal Composite Testing (FTP) procedure and lowering LLC’s NOx well below current guidelines. In particular, the use of the same post-treatment system with the addition of a 48-volt electric heater located upstream of the SCR further reduced CO2 emissions.
CDA technology can also benefit automakers facing tougher emissions standards in Europe. The next set of requirements, known as Euro VII for heavyweights, are targeted for the second part of the decade. In the United States, CARB is introducing more stringent regulations as early as 2024, while the EPA has circled 2027 to begin enforcing stricter emissions limits on new heavy-duty vehicle models. Collectively, these standards are designed to reduce exhaust NOx emissions by up to 90%, accelerating the need for global engine manufacturers to employ additional emission reduction strategies such as electric catalyst heating. This technology is an example of how Eaton is moving towards achieving its 2030 sustainability goals. By 2030, the company aims to reduce emissions by 15% across its solutions and throughout its value chain.