Mahle International Gmbh

Mahle Metal Leve S/a

José Valentim Lima Sarabanda

Juliano Avelar Araujo

Robert Richard Banfield

Gisela Ablas Marques

Nuno Costa

Matheus Dos Santos Ferreira

Paulo José Da Rocha Mordente

Mario Sergio Da Silva PRAÇA

A piston ring for internal combustion engines provided with a ferrous alloy base includes an annular outer surface on which a coating including at least one outer layer is applied deposited on an adhesive layer, the outer layer being provided with a variable thickness, in such a way that the thickness of the outer layer gradually increases from 90&#xb0; and 270&#xb0; towards 0&#xb0; and 360&#xb0; respectively, with the thickness attaining its maximum value in the region of 10&#xb0; and 350&#xb0; and slightly decreasing towards 0&#xb0; and 360&#xb0; so as to ensure an optimal working condition, minimizing the contact pressure and consequently the accelerated wear in the vicinities of the ends of the ring, in addition to preventing and/or impeding the detachment of the outer layer of the coating.

Piston ring for internal combustion engines

Growing community of inventors

Morumbi, Brazil

José Valentim Lima Sarabanda