World first: Daimler opts for plastic engine support; replaces aluminum


Daimler is installing the world's first plastic engine support for the six-cylinder diesel engine used in the new GL Class. Compared to the previous aluminum support, the plastic part offers improved acoustical properties, better thermal insulating characteristics and a 30% weight advantage, while being able to withstand the same load.

The part, which supports the engine with the aid of the engine mounts, is molded from Ultramid A3WG10 CR, a highly reinforced specialty polyamide (PA) from BASF (Ludwigshafen, Germany) that has been optimized for high mechanical loads. Joma-Polytec (Bodelshausen, Germany) was responsible for designing the injection mold and producing the plastic engine support.

The torque supports that are already used by various automakers in versions of Ultramid transmit only the tilting moment of the engine. In contrast, engine supports are subject to a permanent load—the engine's weight—while absorbing in addition the entire engine torque. To date, they have always been made from aluminum....
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