Unlike traditional hollow valves, the head portion of the new valves is composed of two separate sections that are welded together during the production process. This enables higher flexibility in the sodium cavity design, increasing volume and assuring optimal sodium flow. The welding design and its tested technology ensure the valves comply with the most demanding industry validation targets.
“The new generation of Eaton valves represents the next step in valve evolution and will provide solutions customers are asking for,” said Pawel Wolski, business unit director, Valvetrain, Eaton’s Vehicle Group. “Eaton continues to provide solutions to its customers as vehicle emissions become increasingly stringent.”
As international emission standards for vehicles tighten, it has led to new homologation cycles and the limiting of emissions worldwide. In the near future, regulations on fuel consumption are expected to be even more demanding, forcing manufacturers to design engines with higher air-to-fuel ratios or reconfigure the entire engine calibration map.
The new valves have the capability to cool down the combustion face and, therefore, the chamber temperature, which increases the spark advance and air-to-fuel ratio because the engine is less inclined to knock. As a result, the brake specific fuel consumption (BSFC) can be increased and emissions reduced.
The new valves have undergone several tests for durability and performance, including:
- Welding fatigue
- Overspeed durability
- Abusive dynamic durability
- Full-power/ Full-load durability
- Thermometric analysis
- Knock limit characterization
- Brake specific fuel consumption measurement
Eaton’s next-generation sodium-filled hollow-head valves are currently being evaluated by several global automakers, with start of production scheduled for 2023.
Learn more about Eaton’s valves.
Eaton’s mission is to improve the quality of life and the environment through the use of power management technologies and services. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic, and mechanical power – more safely, more efficiently, and more reliably. Eaton’s 2020 revenues were $17.9 billion, and we sell products to customers in more than 175 countries. We have approximately 92,000 employees. For more information, visit www.eaton.com
