GERAEUSCHDAEMMENDE VERKLEIDUNG FUER DEN MOTORRAUM VON KRAFTFAHRZEUGEN.

摘要

A noise absorbing lining for the engine space of a motor vehicle consists of four layers. The first layer is made of aramide fibre mat with a unit weight of 130 g/sq.m., the second layer is rock wool or basalt wool (1500g/bq.m), the third layer is a textile material, pref. rayon or carded wool (800 g/sq.m.) and the fourth layer is made of a polyester fibre mat (150g/sq.m). The side toward the engine is best lined with aluminium foil.