Valeo Corporation

Valeo Embrayages

Valeo Materiaux De Friction

Erick Duno

Philippe Pantier

George Skotnicki

Géraud Vatin

Jean-Pierre Boutaud

Cécile Rommeru

Loïc Adamczak

Erick Lejamtel

Philippe Walter

Philippe Boule

Isabelle Alix

Guillaume Garestier

Aurelien Vergnaud

Jean Francois Rainaud

Paolo Viola

A friction material intended to equip a device for applying friction in a liquid medium, including a fiber mat impregnated with a heat-curable resin. The fiber mat consists of fibers whose length is greater than or equal to 12 mm, and is teased, coated and needled. The friction material features a porosity greater than or equal to 30% by volume and less than or equal to 60% by volume. The friction material includes activated charcoal loads whose specific surface is between 500 m2/g and whose mass content in the friction material is greater than or equal to 5% by weight and less than or equal to 15% by weight.

Friction material for applying friction in liquid medium, and associated device and method

The invention proposes a device using friction in a liquid medium having a support, notably metallic, on which an interface surface forms a support for a friction lining, with a flat annular shape overall, produced from a friction material which has a porous structure with communicating cells and which has areas (M , M , M ) with different controlled porosities. The method of manufacturing the friction lining including a step of moulding under pressure, whilst the interface surface of the support has at least one groove in which there extends the friction material moulded under pressure in order to constitute an area of controlled porosity (M , M ) greater than the mean porosity (M , M ) of the body made from friction material constituting the lining.

Device using friction in a liquid medium and having a friction lining with controlled porosity

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Limoges, France

Erick Duno