German automotive supplier MAHLE Engine Components has developed a new lead-free bearing system for heavy-duty truck engines. The system combines engineered polymeric coatings with lead-free bearing linings, and purportedly offers several advantages over other bearings.
The first heavy-duty diesel engines to use the new lead-free bearings are slated to appear on vehicles beginning this year, and product development programs for additional applications are already underway with two major engine manufacturers. Production of the lead-free bearing system began this summer at MAHLE¡¯s facility in Atlantic, Iowa.
Improving Wear Resistance
The company¡¯s research shows that MAHLE¡¯s polymer-coated bearings are more resistant to wear and fatigue than other lead-free bearings, which use electroplated coatings. Improved wear resistance helps engine manufacturers accommodate low-viscosity engine oils, which work to improve fuel economy.
Customer testing of the polymer-coated bearings has also shown improved performance over the electroplated alternatives, according to the company.
"Polymer technology is well established in the light- and medium-duty market for engines under 10 liters in displacement," said MAHLE¡¯s James George, who suggested that the heavy-duty market is in need of alternatives.
Other reported benefits of the new MAHLE system include improved corrosion resistance and extended oil-drain intervals. Beyond performance enhancements, lead-free bearings also offer environmental benefits as they¡¯re safer and easier to dispose of. The company has also stated that its lead-free, polymer-coated bearing system will offer significant owner-operator cost savings.
"Our new bearing system provides a great combination of proven cast-bronze bearing technology with a polymer overlay that features high load capabilities, as well as seizure and wear resistance," said MAHLE¡¯s Joachim Wagenblast.
In even better news for automotive manufacturers, check out Smart Manufacturing Could Save Global Automakers Billions.
-2017 China(Guangzhou) Int¡¯l Bearing and Equipment Exhibition
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