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The all-new G-Class makes its public debut at the Detroit auto show in G550 form. Completely redeveloped and fitted with a 4.0-liter V8 biturbo gasoline engine offering 427ps and 450 lb-ft of torque at 2,000rpm to 4,750rpm, despite near-identical looks to its predecessor plenty has changed for the Mercedes-Benz SUV.

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Federal-Mogul unveil advanced gasket and sealing technology

Federal-Mogul is supporting the commercial vehicle industry’s drive towards greener, more efficient engines with sealing technologies that enable reliable operation at cylinder pressures up to 250 bar and exhaust temperatures up to 1000°C. The company’s hybrid steel-elastomer head gaskets combine proven multi-layer steel (MLS) technology and elastomeric fluid sealing in a single product that provides optimum sealing of both combustion gases and engine fluids. Its High Temperature Alloys (HTA) and High Temperature Coatings (HTC) seal exhaust joints reliably at temperatures beyond the capability of conventional stainless steel and graphite materials.

“Steel-elastomer gasket technology builds on the success of MLS gaskets in providing optimized sealing loads around the combustion chamber, but goes much further,” said Mike Gerulski, Federal-Mogul’s director of global research and development in sealing. “By adding elastomer sealing for the fluid passages, which require much lower loads to seal, we can concentrate the sealing forces where they are most useful. This opens up greater potential to design lighter, yet robust, engine structures and enables peak cylinder pressures up to 250 bar. Further, Federal-Mogul’s extensive expertise in material science enables us to develop elastomeric materials that address fluid compatibility and temperature interactions.”


Steel-elastomer gasket technology is applied using Federal-Mogul’s proprietary Analysis-Led-Design (ALD) process, which takes a holistic approach to optimize the cylinder head, block and gasket structure as a system. ALD drives the selection of the appropriate sealing technology and its verification. The process has become so well established within Federal-Mogul that the company is able to reliably predict the sealing and durability behavior of cylinder head gaskets before engine prototype hardware is readily available. “Through the use of ALD, we can help to eliminate costly engineering changes late in an engine’s development program,” added Gerulski.

Federal-Mogul also utilizes ALD for highly stressed gaskets in the exhaust system, where fluctuating high temperatures and system weight reduction driven by downsizing, turbocharging and exhaust gas recirculation (EGR) can result in flange distortion, making conventional static gaskets ineffective. Federal-Mogul’s HTA gasket materials address these challenges, providing reliable sealing performance at temperatures up to 1000°C. HTA gaskets are available with thermal performance characteristics matched to the individual requirements of a wide range of demanding applications, including turbochargers, downpipes, exhaust manifolds and EGR systems.

Equally important for reliable joint sealing are Federal-Mogul’s HTC coatings. An environmentally friendly, water-based product, HTC provides a robust solution at elevated temperatures. “HTC demonstrates thermal stability to over 1000°C, while conventional coatings are reduced to ash at such temperatures,” said Gerulski.

Federal-Mogul will present its advanced gasket and sealing technology at the IAA Commercial Vehicles Show in Hannover in September.

11 June 2014


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