Patent ID: 7141226
Filing Date: 2006-11-28
Classification: B01D,F01N,Y02A

Abstract:
1. An oxidation catalyst for a light-duty diesel vehicle comprising a first upstream part having a heat capacity and a second downstream part of higher heat capacity relative to the first part, each part comprising a substrate and a catalyst support coated thereon, wherein at least the substrate of the downstream catalyst part is ceramic and the open cross-sectional area of the second part is greater than the open cross-sectional area of the first part, and wherein the total cross-sectional area of the front face of the second part is greater than the total cross-sectional area of the front face of the first part, wherein the exhaust gas has a longer residence time in the second part than in the first part, and wherein the substrate of the upstream catalyst part is a metal foil having a wall thickness of ≦20 μm.