Patent ID: 8394348

Claim:
A catalyst composite for the purification of exhaust gases of a combustion engine substantially running under stoichiometric conditions comprising in sequence and in order: a front double layer on a substrate having a front 1 st (lower) catalytic layer and a front 2 nd (upper) catalytic layer; and a rear double layer on a substrate having a rear 1 st (lower) catalytic layer and a rear 2 nd (upper) catalytic layer; wherein the front 2 nd catalytic layer and the rear 2 nd catalytic layer comprise rhodium as platinum group metal compound; wherein the front 1 st catalytic layer and the rear 1 st catalytic layer comprise palladium as platinum group metal compound; wherein the rear 1 st catalytic layer is substantially free of an oxygen storage component (OSC); wherein the front double layer forms a front zone and the rear double layer forms a rear zone where the catalyst composite is a single brick system or the front double layer is located in a front brick and the rear double layer is located in a rear brick where the catalyst composite is a multi-brick system; and wherein the content of oxygen storage component (OSC) by weight of the layers are as follows: front 1 st catalytic layer—10-80% by weight of the layer; front 2 nd catalytic layer—20-80% by weight of the layer; and rear 2 nd catalytic layer—20-80% by weight of the layer.