Carcoustics Tech Center Gmbh

Christian Gnädig

Albert Kallenberg

Herbert Vollmert

Jürgen Berbner

Christoph Pirchl

Hans Rudolf Czerny

Heinz Blömeling

The invention relates to an acoustically effective wheel house covering for vehicles, i.e. a wheel house covering which can reduce transmission of splash water noises in the passenger compartment of the vehicle and which can absorb the sound of rolling tires on a roadway, which wheel house covering comprises several layers of material. In order to improve the sound-absorbing effect of such wheel house coverings, it is proposed that the wheel house covering is formed of at least three air-permeable sandwiched layers of material () comprising a first textile material layer () facing the wheel housing, with the air permeability of said first textile material layer at a test pressure of 1 mbar ranging from 15 to 60 l/ms, and with the air permeability of a second textile material layer () arranged between the first () and third () material layers at a test pressure of 1 mbar ranging from 100 to 1500 l/ms, wherein the third material layer () is a textile material layer facing the tire, with the air permeability of said third material layer at a test pressure of 1 mbar ranging from 20 to 200 l/ms.

Acoustically effective wheel house covering for vehicles

The invention relates to a soundproof thermal shield (), particularly for motor vehicles, comprising an aluminum support (), a noise-absorbing layer () and an aluminum thermal covering (). In order to make the inventive soundproof thermal shield easy to recycle while obtaining a great thermal shielding effect and noise-absorbing power, a permeable mat made of knitted aluminum is used as a noise-absorbing layer (), said knitted aluminum being superimposed in several layers and pressed so as to form the permeable mat. The inventive thermal shield is thus made of a single material. Preferably, the support () is made of a microperforated aluminum sheet while the thermal covering () is preferably made from an aluminum film.

Soundproof thermal shield

A sound absorber (A), especially for motor vehicles, comprising a layer () of absorption material, such as open-pored or optionally closed pored foamed material or a wood fiber composite, and a top layer () . The aim of the invention is to produce an absorber in such a way that said absorber is easy to produce and assemble and functions well. According to the invention, the top layer () for leading through a loom of cables () or the like is provided with a tubular recess () for leading through a loom of cables. Said recess () is provided with groove-like undercuts () on the outside.

Growing community of inventors

Mechernich, Germany

Christian Gnädig