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Federal-Mogul develops new piston ring coating

ABR Staff Writer Published 09 August 2011

Federal-Mogul, a supplier of powertrain and safety technologies, has developed a new piston ring coating that helps gasoline engines become more fuel-efficient.

The company's CarboGlide coating delivers a direct improvement in fuel economy and CO2 emissions by reducing ring friction by up to 20%.

The company said that CarboGlide's high wear resistance will withstand an engine's full operational life - even in the new generation of high-output gasoline engines with turbocharging or direct injection.

In addition the new piston ring protects the cylinder surface from scuffing and scoring, especially under the critical lubrication conditions, because of its chemical and physical stability.

Federal-Mogul SVP of powertrain energy Rainer Jueckstock said CarboGlide provides engine manufacturers and vehicle owners with a strong advantage over other coated rings in the market by delivering an extremely low friction coefficient, superior wear resistance and long life.

"Our CarboGlide-coated rings provide engine manufacturers with an immediate, cost-effective fuel economy improvement that is easy to implement," Jueckstock said.

"The friction-reducing, fuel-economy improvement benefits contribute also to reduce the carbon footprint of gasoline-powered vehicles."

CarboGlide's structure can be produced for a coating thickness of 10 microns, more than three times that of the industry's new DLC coating.

Federal-Mogul manager of physical coatings Marcus Kennedy said the company tests on engines, using both cast iron and high-silicon aluminum cylinder surfaces, have shown that CarboGlide-coated rings minimize friction and scuffing for the full expected life of the engine, even in the challenging environment typical of GDI turbo engines.

"The unique combination of low friction, low wear and scuffing resistance also makes the technology attractive for application to other Federal-Mogul products developed for extreme conditions like face seals on construction machinery," Kennedy said.