Friction Losses // Mercedes-Benz Innovation: NANOSLIDE for Lower Consumption
will now also be used in the series production of Mercedes-Benz diesel engines. Mercedes-Benz was the developer of what is now known as NANOSLIDE technology, in which twin-wire arc spraying is used to melt iron/carbon wires and spray them onto the cylinder surfaces of the light- weight aluminium crankcase with the help of a gasflow. Very fine finishing of the resulting nano- crystalline iron coating creates an almost mirror- like, smooth surface with fine pores, which redu- ces friction and wear between the piston assembly and the cylinder wall. Other advantages include lower engine weight, less fuel consumption and lower emissions. This innovation from Mercedes- Benz has been successfully used in the 6.3-litre AMG engines since 2006.
NANOSLIDE technology sets new standards in the production of cylinder linings. Wires of iron/ carbon alloy are melted in an electric arc, and the melted material is “sprayed” onto the cylinder wall by a gasflow, where it is deposited as a la- yered, ultra-fine to nano-crystalline coating. The NANOSLIDE coating is then given an extremely smooth finish by a special honing process, after which it has a thickness of only 0.1 to 0.15mm and has a mirror-like surface. The honing process also
fter five years and use exclusively in AMG engines, twin-wire arc spraying technology
exposes pores in the material which are able to retain oil and thereby ensure optimal lubrication of the piston assembly. The result is not only low friction, and therefore greatly reduced mechanical friction losses compared to grey cast-iron cylinder liners (up to 50%), but also extremely high wear resistance.
NANOSLIDE reduces the V6 diesel engine weight by 4.3 kilograms compared to the preceding engi- ne, and brings an additional fuel saving of 3%. The V6 diesel engine in the ML 350 BlueTEC, for exam- ple, develops an output of 190 kW (258 hp) from a displacement of 2987 cc, and generates 620 Nm of torque. Thanks to BlueTEC with AdBlue®
treatment, this M-Class model already meets the emission values planned for 2014 in accordance with the Euro-6 standard, and as such is one of the world‘s cleanest diesel vehicles. With a combined consumption of 6.8 litres of diesel per 100 kilome- tres, the ML 350 BlueTEC improves on the figures of its predecessor by 2.1 litres, or 24%.
CO2 emissions have dropped from 235 to 179
grams per kilometre, not least thanks to the new NANOSLIDE technology.
11-08 :: August 2011