New technology will allow rings to withstand higher mechanical and thermal loads
“GDC60 will enable our customers to develop new, more efficient engines with higher cylinder pressures while staying with a familiar, well-proven ring coating technology,” said
Federal-Mogul Powertrain’s GDC coatings are galvanic, enabling use of the very high coating thicknesses required for heavy-duty engines. As cylinder pressures increase, however, greater scuff resistance is required, especially for the first compression ring. The challenge for Federal-Mogul’s engineers has been to maintain the high robustness and cost-effective design advantages associated with GDC coatings, while meeting the increased demands.
In rig tests, GDC60 reduced the friction coefficient up to 7 percent and first engine tests have shown the potential for wear reduction of up to 10 percent compared to GDC50 coatings. This will also benefit the function of the oil rings.
In order to provide GDC60 with greater scuff resistance under high thermal load conditions, Federal-Mogul Powertrain has improved upon the microstructure of GDC50, creating a finer microcrack network containing increased numbers of nanodiamond particles that are also more uniformly distributed.
When conventional fresh oils are used, GDC60 shows a scuff resistance improvement of up to 20 percent on already high levels of thermal load capacity; the improvement is even higher when operating with aged oil. Confirmation studies carried out with very low viscosity lubricating oils (HTHS2.6) demonstrated that GDC60 can withstand the same thermal load level as PVD (Physical Vapor Deposition) coatings.
For specific applications, increased scuff resistance in combination with the proven high level of robustness under borderline loads makes GDC60 the optimum technical option within conventional piston ring coating families. Initial results from endurance testing in a highly loaded heavy-duty engine have confirmed the results of the rig test investigations.
GDC60 will complement the wide portfolio of piston ring coatings offered by Federal-Mogul Powertrain. Comprising galvanic, PVD and other technologies, the range also includes the premium DuroGlide® product, an amorphous carbon-based coating that contains a high percentage of diamond-like-carbon and which set a new benchmark for low friction and wear when introduced in 2014.
“Our expertise with a range of coating technologies means we can provide each customer with a ring pack specification tailored to their particular requirements,” explained Dr.
Federal-Mogul Powertrain’s new GDC60 technology will be featured in the company’s display at the IAA Show in
Federal-Mogul Powertrain designs and manufactures original equipment powertrain components and systems protection products for automotive, heavy-duty, industrial and transport applications.
Federal-Mogul Motorparts sells and distributes a broad portfolio of products through more than 20 of the world’s most recognized brands in the global vehicle aftermarket, while also serving original equipment vehicle manufacturers with products including braking, wipers and a range of chassis components. The company’s aftermarket brands include ANCO® wiper blades BERU®* ignition systems; Champion® lighting, spark plugs, wipers and filters; Interfil® filters; AE®, Fel-Pro®, FP Diesel®, Goetze®, Glyco®, Nüral®, Payen® and
*BERU is a registered trademark of