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Development of Lead Free Overlay for Three Layer Bearings of Highly Loaded Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
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Emission control and other restrictions prescribed in the EU's recent EUROIV regulations require automobile manufacturers to decrease NOX and PM (Particulate Matter) in exhaust emissions. Diesel engines in recent years tend to have higher cylinder pressure in pursuit of higher performance and meeting emission regulations. At the same time, under the ELV (End-of-Life Vehicles) regulation, use of lead, which is an environmental pollutant, in automobile parts has become increasingly difficult in recent years. Accordingly, we have developed lead-free overlay for tri-metal copper bearings for applications of highly specific load. We chose a dual-layer structure, bismuth and silver overlay. This type of structure can create fatigue resistance without compromising the two advantages of lead overlay: conformability and anti-seizure property.
CitationKawachi, T., Takayanagi, S., Asakura, H., and Ishikawa, H., "Development of Lead Free Overlay for Three Layer Bearings of Highly Loaded Engines," SAE Technical Paper 2005-01-1863, 2005, https://doi.org/10.4271/2005-01-1863.
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