Engine Cylinder-Block Acoustic Shield

This cylinder-block acoustic shield is non-flammable, lightweight, overcomes previous issues with other composites for durability at high-temperatures, and can be molded into any desired shape, permitting parts to be positioned close to the engine or exhaust system to maximize noise shielding vs. metal shields.  A new epoxy binder system was developed to enable press-formed parts to maintain a 3D shape. Further work was done to develop an impregnation process and to optimize the nonwoven aramid fabrics for this application.  This application represents a 93% weight and 22% cost reduction vs. previous technology, and also reduced assembly operations and interior noise levels (max. 1.6 dB noise reductions with only 80 g of material). Thermal performance was also upped from 200C to 310C), and weight reductions contributed to improved fuel efficiency and CO2 emissions.

OEM/Vehicle Hyundai Motor Company 2013 Elantra compact car System Supplier NVH Korea Co., LTD Material Processor NVH Korea Co., LTD

Material Supplier DuPont Co., LTD Resin Nomex N301 Aramid Fiber

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